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AP Calculus AB Free Response Questions

The best way to get better at FRQs is practice. Browse through dozens of practice AP Calculus AB FRQs to get ready for the big day.

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  • Unit 1: Limits and Continuity (28)
  • Unit 2: Differentiation: Definition and Fundamental Properties (28)
  • Unit 3: Differentiation: Composite, Implicit, and Inverse Functions (34)
  • Unit 4: Contextual Applications of Differentiation (43)
  • Unit 5: Analytical Applications of Differentiation (22)
  • Unit 6: Integration and Accumulation of Change (25)
  • Unit 7: Differential Equations (37)
  • Unit 8: Applications of Integration (33)
Unit 1: Limits and Continuity

Absolute Value Function Limits

Consider the function $$f(x)=\frac{|x-3|}{x-3}$$.

Easy

Algebraic Simplification and Limit Evaluation of a Log-Exponential Function

Consider the function $$z(x)=\ln\left(\frac{e^{3*x}+e^{2*x}}{e^{3*x}-e^{2*x}}\right)$$ for $$x \neq

Hard

Analyzing a Piecewise Function for Continuity

Consider the piecewise function $$ f(x)=\begin{cases} 2x+1, & x<2 \\ x^2-1, & x\geq2 \end{cases}$$.

Easy

Analyzing Process Data for Continuity

A manufacturing process produces items whose lengths (in mm) are recorded as a function f(x) of time

Medium

Area and Volume Setup with Bounded Regions

Consider the region R bounded by the curves $$y = x^2$$, $$y = 4$$, and $$x = 0$$. Though integratio

Hard

Continuity Analysis with a Piecewise-defined Function

A particle’s displacement is described by the piecewise function $$s(t)= \begin{cases} t^2+1, & t <

Easy

Continuity and Asymptotic Behavior of a Rational Exponential Function

Consider the function $$q(x)= \frac{e^{2*x} - 4}{e^{x} - 2}$$. Notice that the function is not defin

Medium

Continuity of a Radical Function

Consider the function $$f(x)=\sqrt{x-1}$$. Answer the following parts.

Medium

Evaluating Limits Near Vertical Asymptotes

Consider the function $$h(x) = \frac{x + 1}{(x - 2)^2}$$. Answer the following:

Medium

Exponential Limit Parameter Determination

Consider the function $$f(x)=\frac{e^{3*x} - e^{k*x}}{x}$$ for $$x \neq 0$$, and define $$f(0)=L$$,

Medium

Graph Reading: Left and Right Limits

A graph of a function f is provided below which shows a discontinuity at x = 2. Use the graph to det

Medium

Graph Transformations and Continuity

Let $$f(x)=\sqrt{x}$$ and consider the function $$g(x)= f(x-2)+3= \sqrt{x-2}+3$$.

Hard

Graphical Estimation of a Limit

The following graph shows the function $$f(x)$$. Use the graph to answer the subsequent questions re

Medium

Implicit Differentiation Involving Logarithms

Consider the curve defined implicitly by $$\ln(x) + \ln(y) = \ln(5)$$. Answer the following:

Medium

Intermediate Value Theorem Application

Let $$p(x)=x^3-4x-5$$. Use the Intermediate Value Theorem (IVT) to show that the equation \(p(x)=0\)

Easy

Intermediate Value Theorem in Equation Solving

A continuous function defined on [0, 10] is given by $$f(x)= \frac{x}{10} - \sin(x)$$.

Medium

Limits Involving a Removable Discontinuity

Consider the function $$g(x)= \frac{(x+3)(x-2)}{x-2}$$ defined for $$x \neq 2$$. Answer the followin

Easy

Optimization and Continuity in a Manufacturing Process

A company designs a cylindrical can (without a top) for which the cost function in dollars is given

Hard

Parameter Determination from a Logarithmic-Exponential Limit

Let $$v(x)=\frac{\ln(e^{2*x}+1)-2*x}{x}$$ for $$x\neq0$$. Find the value of the limit $$\lim_{x \to

Hard

Piecewise Function Continuity Analysis

The function f is defined by $$ f(x) = \begin{cases} \frac{x^2 - 1}{x - 1}, & x \neq 1 \\ k, & x

Easy

Real-World Analysis of Vehicle Deceleration Using Data

A study measures the speed of a car (in m/s) as it approaches a stop sign. The recorded speeds at di

Easy

Removable Discontinuity and Direct Limit Evaluation

Consider the function $$f(x)=\frac{(x-2)(x+3)}{x-2}$$ defined for $$x\neq2$$. The function is not de

Easy

Removable Discontinuity in a Rational Function

Consider the function $$f(x)=\begin{cases} \frac{x^2-16}{x-4} & x\neq4 \\ 3*x+1 & x=4 \end{cases}$$.

Easy

Robotic Arm and Limit Behavior

A robotic arm moving along a linear axis has a velocity function given by $$v(t)= \frac{t^3-8}{t-2}$

Hard

Squeeze Theorem with a Trigonometric Function

Consider the function $$f(x) = x^2 \cdot \sin\left(\frac{1}{x}\right)$$ for $$x \neq 0$$, and define

Medium

Squeeze Theorem with an Oscillatory Function

Consider the function $$f(x) = x \cdot \sin\left(\frac{1}{x}\right)$$ for $$x \neq 0$$ and define $$

Medium

Trigonometric Limit Computation

Consider the function $$f(x)= \frac{\sin(5*(x-\pi/4))}{x-\pi/4}$$.

Easy

Water Tank Inflow-Outflow Analysis

Consider a water tank operating over the time interval $$0 \le t \le 12$$ minutes. The water inflow

Medium
Unit 2: Differentiation: Definition and Fundamental Properties

Analyzing Function Behavior Using Its Derivative

Consider the function $$f(x)=x^4 - 8*x^2$$.

Medium

Approximating the Tangent Slope

Consider the function $$f(x)=3*x^2$$. Answer the following:

Easy

Average vs. Instantaneous Rate of Change

Consider the function $$f(x)=2*x^2-3*x+1$$ defined for all real numbers. Answer the following parts

Medium

Bacterial Culture Growth with Washout

In a bioreactor, bacteria grow at a rate of $$f(t)=50*e^{0.05*t}$$ (cells/min) while simultaneous wa

Hard

Chemical Reactor Flow Rates

A chemical reactor is operated so that reactants are added at a rate of $$f(t)=12-t$$ liters/min (fo

Medium

Concavity and the Second Derivative

Consider the function $$f(x)=x^4-4*x^3+6*x^2$$. Answer the following:

Medium

Finding Derivatives of Composite Functions

Let $$f(x)= (3*x+1)^4$$.

Medium

Graph Interpretation of the Derivative

Consider the function $$f(x)= x^3 - 6*x^2 + 9*x + 1$$. A graph of this function is provided below.

Medium

Graphical Interpretation of Rate of Change

Consider the graph of a function provided in the stimulus which shows a vehicle's displacement over

Medium

Higher-Order Derivatives in Motion

A particle moves along a line with its position given by $$s(t)= t^3 - 6*t^2 + 9*t + 5$$, where $$t$

Hard

Implicit Differentiation in Motion

A particle’s motion is given by the implicit equation $$y^2 + x*y = 10$$, where x represents time (i

Hard

Instantaneous Velocity from a Position Function

A ball is thrown upward, and its height in feet is modeled by $$s(t)= -16*t^2 + 64*t + 5$$, where $$

Medium

Interpreting Derivative Graphs and Tangent Lines

A graph of the function $$f(x)=x^2 - 2*x + 1$$ along with its tangent line at $$x=2$$ is provided. A

Medium

Inverse Function Analysis: Cubic Function

Consider the function $$f(x)=x^3+2*x+1$$ defined for all real numbers.

Medium

Inverse Function Analysis: Exponential-Linear Function

Consider the function $$f(x)=e^x+x$$ defined for all real numbers.

Easy

Marginal Cost Analysis

A company's total cost function is given by $$C(x)=5*x^2+20*x+100$$, where $$x$$ represents the numb

Easy

Marginal Profit Calculation

A company’s profit (in thousands of dollars) is given by $$P(x)= -2*x^2 + 50*x - 100$$, where $$x$$

Medium

Polynomial Rate of Change Analysis

Consider the function $$f(x)= x^3 - 2*x^2 + x$$, which models a physical process. Analyze the rates

Medium

Profit Function Analysis

A company's profit function is given by $$P(x)=-2x^2+12x-5$$, where x represents the production leve

Medium

Secant and Tangent Lines to a Curve

Consider the function $$f(x)=x^2 - 4*x + 5$$. Answer the following questions:

Easy

Secant Approximation Convergence and the Derivative

Consider the natural logarithm function $$f(x)= \ln(x)$$. Investigate its rate of change using the d

Extreme

Secant Line Slope Approximations in a Laboratory Experiment

In a chemistry lab, the concentration of a solution is modeled by $$C(t)=10*\ln(t+1)$$, where $$t$$

Medium

Secant Slope from Tabulated Data

A table below gives values of a function $$f(x)$$ representing the concentration of a solution at di

Medium

Secant vs. Tangent Rate Comparison

For the function $$f(x)=x^2$$, we analyze the relationship between the secant and tangent approximat

Easy

Tangent and Normal Lines in Road Construction

A road is modeled by the quadratic function $$f(x)= \frac{1}{2}*x^2 + 3*x + 10$$.

Medium

Tangent Line Approximation

Suppose a continuous function $$f(x)$$ is differentiable with $$f(2)=8$$ and $$f'(2)=5$$. Use this i

Easy

Tangent to an Implicit Curve

Consider the curve defined implicitly by \(x^2 + y^2 = 25\). Answer the following parts.

Easy

Using the Quotient Rule for a Rational Function

Let $$f(x) = \frac{3*x+5}{x-2}$$. Differentiate $$f(x)$$ using the quotient rule.

Medium
Unit 3: Differentiation: Composite, Implicit, and Inverse Functions

Advanced Implicit Differentiation: Second Derivative Analysis

Consider the curve defined implicitly by the equation $$x^2*y+\sin(y)= x^3$$.

Extreme

Analyzing Motion in the Plane using Implicit Differentiation

A particle moves in the xy-plane along a path defined implicitly by $$x^2+x*y+y^2=7$$. Determine the

Medium

Chain Rule in a Light Intensity Model

The intensity of light is modeled by $$I(r) = \frac{1}{r^2}$$, where r is the distance (in meters) f

Medium

Chain Rule in Angular Motion

An object rotates such that its angular position is given by $$\theta(t)= \arctan(3*t^2)$$, where $$

Medium

Chain Rule with Exponential and Polynomial Functions

Let $$h(x)= e^{3*x^2+2*x}$$ represent a function combining exponential and polynomial elements.

Easy

Combining Composite and Implicit Differentiation

Consider the equation $$e^{x*y}+x^2-y^2=7$$.

Hard

Comparing the Rates between a Function and its Inverse

Let $$f(x)=x^5+2*x$$. Answer the following:

Hard

Composite and Product Rule Combination

The function $$F(x)= (3*x^2+2)^{4} * \cos(x^3)$$ arises in modeling a complex system. Answer the fol

Hard

Composite Function in Finance

An account balance is modeled by the function $$B(t)=(2*t+1)^{3/2}$$ dollars, where $$t$$ represents

Medium

Composite Function Involving Exponential and Cosine

Consider the function $$f(x)= e^(\cos(x^2))$$. Address the following:

Easy

Composite Function with Multiple Layers

Suppose an economic model is described by the function $$F(x)=\sqrt{\ln(3*x^2+2)}$$, where $$x$$ rep

Hard

Differentiating an Inverse Trigonometric Function

Let $$y = \arcsin\left(\frac{2*x}{1+x^2}\right)$$.

Hard

Differentiation of a Composite Rational Function

Let $$f(x)=\frac{(2*x+1)^3}{\sqrt{5*x-2}}$$. Use the chain rule and the quotient (or product) rule t

Hard

Differentiation of Inverse Trigonometric Composite Function

Given the function $$y = \arctan(\sqrt{x})$$, answer the following parts.

Easy

Differentiation of Inverse Trigonometric Functions in Physics

In an optics experiment, the angle of refraction \(\theta\) is given by $$\theta= \arcsin\left(\frac

Easy

Estimating Derivatives Using a Table

An experiment measures a one-to-one function $$f$$ and its inverse $$g$$, yielding the following dat

Easy

Implicit Differentiation in an Elliptical Orbit

Consider the ellipse defined by $$4*x^2 + 9*y^2 = 36$$, which can model the orbit of a satellite.

Easy

Implicit Differentiation Involving Exponential Functions

Let the equation $$x*e^{y}+y*e^{x}=10$$ define $$y$$ implicitly as a function of $$x$$. Use implicit

Hard

Implicit Differentiation with Exponential Terms

Consider the equation $$e^{x} + y = x + e^{y}$$ which relates $$x$$ and $$y$$ via exponential functi

Hard

Implicit Differentiation with Exponential-Trigonometric Functions

Consider the curve defined implicitly by $$e^x \cos(y) + y = x$$.

Hard

Implicit Differentiation with Product Rule

Consider the implicit equation $$x*y+y^2=6$$ which defines $$y$$ as a function of $$x$$. Use implici

Medium

Implicit Differentiation with Product Rule

Consider the equation $$x*y+e^{y}=x^2$$. Answer the following:

Medium

Inverse Function Derivative and Recovery

Let $$f(x)=x^3+x$$, which is one-to-one on a suitable interval. Answer the following parts.

Medium

Inverse Function Derivative for a Log-Linear Function

Let $$f(x)= x+ \ln(x)$$ for $$x > 0$$ and let g be the inverse of f. Solve the following parts:

Medium

Inverse Function Differentiation

Let $$f(x)=x^3+x$$ which is one-to-one on its domain. Its inverse function is denoted by $$g(x)$$.

Easy

Inverse Function Differentiation in a Biological Growth Model

In a bacterial growth experiment, the population $$P$$ (in colony-forming units) at time $$t$$ (in h

Extreme

Inverse Function Differentiation in a Piecewise Scenario

Consider the piecewise function $$f(x)=\begin{cases} x^2+1, & x \geq 0 \\ -x+1, & x<0 \end{cases}$$

Extreme

Inverse Function Differentiation with Exponentials and Trigonometry

Let $$f(x)=\sin(e^{x})+e^{x}$$ and assume that it is invertible. Answer the following:

Extreme

Inverse Trigonometric Differentiation

Let $$y = \arcsin\left(\frac{2*x}{1+ x^2}\right)$$. Answer the following parts.

Hard

Logarithmic Differentiation of a Composite Function

For the function $$y= (x^2+1)^(\tan(x))$$, use logarithmic differentiation to address the following

Hard

Population Dynamics via Composite Functions

A biological population is modeled by $$P(t)= \ln\left(20*e^(0.1*t^2)+ 5\right)$$, where t is measur

Medium

Related Rates via Chain Rule

A spherical balloon is being inflated so that its volume increases at a rate of $$\frac{dV}{dt}=150\

Medium

Water Tank Flow Analysis using Composite Functions

A water tank is equipped with an inflow system and an outflow system. At time $$t$$ (in minutes), wa

Medium

Water Tank Optimization Using Composite Functions

A water tank has an inflow rate given by $$I(t)= 3+2\sin(0.1*t)$$ and an outflow rate given by $$O(t

Extreme
Unit 4: Contextual Applications of Differentiation

Analysis of Experimental Data

The graph below shows the displacement of an object moving in a straight line. Analyze the object's

Medium

Analysis of Particle Motion

A particle moves along a horizontal line with velocity function $$v(t)=4t-t^2$$ (m/s) for $$t \geq 0

Medium

Balloon Altitude and Temperature

A hot air balloon rises such that its altitude is given by $$h(t)=3*t^{2/3}$$ meters, where t is in

Medium

Biochemical Reaction Rate Analysis

A biochemical reaction proceeds with a rate modeled by $$R(t)=50t(1-t)^2$$ for $$0\le t\le1$$ (where

Hard

Cost Efficiency in Production

A firm's cost function for producing $$x$$ items is given by $$C(x)=0.1*x^2 - 5*x + 200$$. Analyze t

Medium

Cost Estimation using Linearization

The cost (in dollars) to manufacture $$x$$ items is given by $$C(x) = 0.005x^3 - 0.2x^2 + 50x + 200$

Hard

Deceleration with Air Resistance

A car’s velocity is modeled by $$v(t) = 30e^{-0.2t} + 5$$ (in m/s) for $$t$$ in seconds.

Hard

Demand Function Inversion and Analysis

The product demand is modeled by $$p(q)=\frac{100}{q+1}+20$$, where p is the price (in dollars) and

Hard

Economic Cost Function Linearization

A company's production cost is modeled by $$C(x)= 0.02*x^3 - 1.5*x^2 + 40*x + 200$$ dollars, where $

Hard

Economic Inflation Rate

The cost of a commodity is modeled by $$C(t)=100e^{0.03*t}$$ dollars, where t is in years.

Easy

Expanding Balloon: Related Rates with a Sphere

A spherical balloon is being inflated so that its volume increases at a constant rate of $$dV/dt = 1

Medium

Expanding Oil Spill

The area of an oil spill is modeled by $$A(t)=\pi (2+t)^2$$ square kilometers, where $$t$$ is in hou

Easy

Exponential Decay in Radioactive Material

A radioactive substance decays according to $$M(t)=M_0e^{-0.07t}$$, where $$M(t)$$ is the mass remai

Easy

Falling Object Analysis

An object is dropped from a height and its position is modeled by $$s(t)=100-4.9t^2$$ (in meters), w

Medium

Falling Object's Velocity Analysis

A rock is thrown upward from the top of a building with a velocity function $$v(t)= 20 - 9.8*t$$ (in

Easy

FRQ 1: Vessel Cross‐Section Analysis

A designer is analyzing the cross‐section of a vessel whose shape is given by the ellipse $$\frac{x^

Medium

FRQ 3: Ladder Sliding Problem

A 13­m ladder leans against a vertical wall. Its position satisfies the equation $$x^2 + y^2 = 169$$

Medium

FRQ 6: Particle Motion Analysis on a Straight Line

A particle moving along a straight line has its velocity described by $$v(t) = 3*t^2 - 4*t + 2$$, wh

Medium

Implicit Differentiation in Related Rates

A 5-foot ladder leans against a wall such that its bottom slides away from the wall. The relationshi

Easy

Inverse Trigonometric Analysis for Navigation

A navigation system relates the angle of elevation $$\theta$$ to a mountain with the horizontal dist

Hard

Linear Approximation for Function Values

Consider the function $$f(x) = x^3$$. Use linearization at $$x = 4$$ to approximate the value of $$f

Medium

Local Linearization Approximation

Let $$f(x)=x^3.$$ We want to approximate $$f(4.02)$$ using linearization near $$x=4$$.

Easy

Logarithmic Profit Optimization

A company’s profit is modeled by $$P(x) = 50x \ln(x) - 100x$$, where $$x$$ (in thousands) is the num

Hard

Marginal Profit Analysis

A company's profit in thousands of dollars is given by $$P(x)= -0.5*x^2+20*x-50$$, where $$x$$ (in h

Medium

Medicine Dosage: Instantaneous Rate of Change

The concentration of a medicine in the bloodstream is given by $$C(t) = 25e^{-0.2t}+5$$, where $$t$$

Medium

Multi‐Phase Motion Analysis

A car's motion is described by a piecewise velocity function. For $$0 \le t < 2$$ seconds, the veloc

Medium

Optimization: Minimizing Material for a Box

A company wants to design an open-top box with a square base that holds 32 cubic meters. Let the bas

Hard

Particle Motion Analysis

A particle moves along a straight line with displacement given by $$s(t)=t^3-6t^2+9t+2$$ for $$0\le

Medium

Particle Motion Analysis

A particle moves along a straight line with an acceleration given by $$a(t) = 6 - 4*t$$, where $$t$$

Medium

Particle Motion and Changing Acceleration

A particle moves along a line with its position given by $$s(t)= \ln(t+1) - t$$, where t (in seconds

Medium

Projectile Motion with Velocity Components

A projectile is launched from the ground with a constant horizontal velocity of 15 m/s and a vertica

Medium

Rate of Change in Pool Volume

The volume $$V(t)$$ (in gallons) of water in a swimming pool is given by $$V(t)=10t^2-40t+20$$, wher

Easy

Related Rates in a Conical Tank

Water is being poured into a conical tank at a rate of $$\frac{dV}{dt}=10$$ cubic meters per minute.

Hard

Related Rates: Inflating Spherical Balloon

A spherical balloon is being inflated such that its volume increases at a constant rate of $$20$$ cu

Medium

Revenue Function and Marginal Revenue Analysis

A company's revenue is modeled by $$R(x)= -0.5*x^3 + 20*x^2 + 15*x$$, where $$x$$ represents the num

Extreme

Route Optimization for a Rescue Boat

A rescue boat must travel from a point on the shore to an accident site located 2 km along the shore

Hard

Shadow Length: Related Rates

A 15-foot tall lamp post casts light on a 6-foot tall man walking away from the lamp at 4 ft/sec. Le

Medium

Tangent Line and Linearization Approximation

Let $$f(x)=\sqrt{x}$$. Use linearization at $$x=16$$ to approximate $$\sqrt{15.7}$$. Answer the foll

Easy

Temperature Change in a Cooling Process

A cup of coffee cools according to the function $$T(t)=70+50e^{-0.1*t}$$, where $$T$$ is in degrees

Easy

Temperature Change in a Cooling Process

A cup of coffee cools according to the function $$T(t)= 80 + 20e^{-0.3t}$$, where t is measured in m

Medium

Temperature Change in Cooling Coffee

A cup of coffee cools according to the model $$T(t) = 90e^{-0.05t} + 20$$, where $$t$$ is the time i

Easy

Using L'Hospital's Rule to Evaluate a Limit

Consider the limit $$L=\lim_{x\to\infty}\frac{5x^3-4x^2+1}{7x^3+2x-6}$$. Answer the following:

Medium

Water Tank Volume Change

A water tank is being filled and its volume is given by $$V(t)= 4*t^3 - 9*t^2 + 5*t + 100$$ (in gall

Medium
Unit 5: Analytical Applications of Differentiation

Airport Runway Deicing Fluid Analysis

An airport runway is being de-iced. The fluid is applied at a rate $$F(t)=12*\sin(\frac{\pi*t}{4})+1

Medium

Area Bounded by $$\sin(x)$$ and $$\cos(x)$$

Consider the functions $$f(x)= \sin(x)$$ and $$g(x)= \cos(x)$$ on the interval $$[0, \frac{\pi}{2}]$

Easy

Area Growth of an Expanding Square

A square has a side length given by $$s(t)= t + 2$$ (in seconds), so its area is $$A(t)= (t+2)^2$$.

Easy

Chemical Reaction Rate and Exponential Decay

In a chemical reaction, the concentration of a reactant declines according to $$C(t)= C_0* e^{-k*t}$

Medium

Concavity and Inflection Points in a Quartic Function

Analyze the concavity and determine any points of inflection for the function $$f(x)= x^4 - 4*x^3$$.

Medium

Designing an Enclosure along a River

A farmer wants to build a rectangular enclosure adjacent to a river, using the river as one side of

Easy

Finding Local Extrema Using the First Derivative Test

Consider the function $$f(x) = x^3 - 6*x^2 + 9*x + 2$$. Answer the following:

Medium

Increasing/Decreasing Behavior in a Financial Model

A financial analyst models the performance of an investment with the function $$f(x)= \ln(x) - \frac

Medium

Inverse Analysis of a Function with an Absolute Value Term

Consider the function $$f(x)=x+|x-2|$$ with the domain restricted to $$x\ge 2$$. Analyze the inverse

Easy

Inverse Analysis of a Function with Parameter

Consider the function $$f(x)=x^3+a*x$$ where a is a real parameter. Analyze the invertibility of f a

Medium

Inverse Analysis of a Logarithm-Exponential Hybrid Function

Consider the function $$f(x)=\ln(x+2)+e^(x)$$ defined for $$x>-2$$. Address the following regarding

Hard

Inverse Analysis of a Logarithmic Function

Consider the function $$f(x)=\ln(x-1)$$ defined for $$x>1$$. Answer the following questions about it

Easy

Inverse Analysis of a Quadratic Function (Restricted Domain)

Consider the function $$f(x)=x^2-4*x+7$$ defined on the restricted domain $$[2, \infty)$$. Analyze t

Medium

Jump Discontinuity in a Piecewise Linear Function

Consider the piecewise function $$ f(x) = \begin{cases} 2x + 1, & x < 3, \\ 2x - 4, & x \ge 3. \end

Easy

Logistic Growth Model and Derivative Interpretation

Consider the logistic growth model given by $$f(t)= \frac{5}{1+ e^{-t}}$$, where $$t$$ represents ti

Medium

Mean Value Theorem for a Logarithmic Function

Consider the function $$f(x)= \ln(x)$$ defined on the interval $$[1, e^2]$$. Use the Mean Value Theo

Easy

Motion Analysis with Acceleration Function

A particle moves along a straight line with an acceleration given by $$a(t) = 6 - 4*t$$ (in m/s²). G

Medium

Pharmacokinetics: Drug Concentration Decay

A drug in the bloodstream decays according to $$D(t)= D_0*e^{-k*t}$$, where $$t$$ is in hours. Answe

Hard

Polynomial Rational Discontinuity Investigation

Consider the function $$ g(x) = \begin{cases} \frac{x^3 - 8}{x - 2}, & x \neq 2, \\ 5, & x = 2. \en

Easy

Reservoir Evaporation and Rainfall

A reservoir gains water through rainfall and loses water by evaporation. Rainfall occurs at a rate g

Hard

Reservoir Sediment Accumulation

A reservoir experiences sediment deposition from rivers and sediment removal via dredging. The sedim

Medium

Temperature Analysis Over a Day

The temperature $$f(x)$$ (in $$^\circ C$$) at time $$x$$ (in hours) during the day is modeled by $$f

Hard
Unit 6: Integration and Accumulation of Change

Accumulated Rainfall Estimation

A meteorological station recorded the rainfall rate (in mm/hr) at various times during a rainstorm.

Medium

Antiderivative of a Transcendental Function

Consider the function $$f(x)=\frac{2}{x}$$. Answer the following parts:

Easy

Application of the Fundamental Theorem of Calculus

A particle moves along a straight line with an instantaneous velocity given by $$v(t)=3*t^2+2*t$$ (i

Medium

Area Under a Curve with a Discontinuous Function

Consider the function $$h(x)= \begin{cases} x+2 & \text{if } 0 \le x < 3,\\ 7 & \text{if } x = 3,\\

Hard

Area Under a Parabola

Consider the quadratic function $$f(x)=x^2 - 4*x + 3$$. Analyze the function on the interval $$[1,4]

Easy

Average Value of a Function

The temperature over the first 8 hours of a day is modeled by $$T(t)=-0.5*t^2 + 4*t + 10$$, where t

Easy

Average Value of a Log Function

Let $$f(x)=\ln(1+x)$$ for $$x \ge 0$$. Find the average value of $$f(x)$$ on the interval [0,3].

Hard

Cell Growth and Accumulation

A biologist models the rate of cell production in a culture by the function $$R(t)=0.1*t^{2} + 2$$ (

Medium

Chemical Production via Integration

The production rate of a chemical in a reactor is given by $$r(t)=5*(t-2)^3$$ (in kg/hr) for $$t\ge2

Medium

Definite Integral Approximation Using Riemann Sums

Consider the function $$f(x)= x^2 + 3$$ defined on the interval $$[2,6]$$. A table of sample values

Medium

Economic Revenue Analysis from Marginal Revenue Data

A company's marginal revenue (in thousands of dollars per hour) is recorded over a 4-hour production

Medium

Elevation Profile Analysis on a Hike

A hiker records the elevation (in meters) along a trail at various distances. Use this data to analy

Medium

Estimating an Integral Using the Midpoint Rule

For the function $$f(x)=\ln(x)$$ defined on the interval [1, e], answer the following:

Hard

Evaluating the Definite Integral of a Power Function

Let $$f(t)= 3*t^{1/3}$$. Evaluate the definite integral $$\int_{27}^{64} 3*t^{1/3}\,dt$$. Answer th

Medium

Finding the Area of a Parabolic Arch

An architect designs an arch described by the parabola $$y = 10 - \frac{x^{2}}{5}$$. The arch spans

Hard

FRQ1: Analysis of an Accumulation Function and its Inverse

Consider the function $$ F(x)=\int_{1}^{x} (2*t+3)\,dt $$ for $$ x \ge 1 $$. Answer the following pa

Medium

FRQ12: Inverse Analysis of a Temperature Accumulation Function

The cumulative temperature above freezing over the morning is modeled by $$ T(t)=\int_{0}^{t} (0.8*t

Easy

FRQ19: Inverse Analysis with a Fractional Integrand

Let $$ M(x)=\int_{2}^{x} \frac{t}{t+2}\,dt $$. Answer the following parts.

Medium

Logistically Modeled Accumulation in Biology

A biologist is studying the growth of a bacterial culture. The rate at which new bacteria accumulate

Extreme

Oxygen Levels in a Bioreactor

In a bioreactor, oxygen is introduced at a rate $$O_{in}(t)= 7 - 0.5t$$ mg/min and is consumed at a

Medium

Particle Motion with Variable Acceleration

A particle moves along a straight line with an acceleration given by $$a(t)=4*t - 2$$ (in m/s²). Giv

Medium

Particle Trajectory in the Plane

A particle moves in the plane with its velocity components given by $$v_x(t)=\cos(t)$$ and $$v_y(t)=

Medium

Vehicle Distance Estimation from Velocity Data

A car's velocity (in m/s) is recorded at several time points during a trip. Use the table below for

Easy

Volume of a Solid by Washer Method

A region is bounded by the curves $$y=\sqrt{x}$$ and $$y=\frac{x}{2}$$. This region, between the cur

Hard

Volume of a Solid with Square Cross Sections

A solid has a base in the xy-plane bounded by the curves $$y=x$$ and $$y=x^2$$. Cross sections perpe

Medium
Unit 7: Differential Equations

Bernoulli Differential Equation

Solve the Bernoulli differential equation $$\frac{dy}{dx}-\frac{1}{x}y=-x*y^2$$ for $$x>0$$ with the

Hard

CO2 Absorption in a Lake

A lake absorbs CO2 from the atmosphere. The concentration $$C(t)$$ of dissolved CO2 (in mol/m³) in t

Easy

Cooling of Electronic Components

After shutdown, the temperature $$T$$ (in °C) of an electronic component is recorded over time (in s

Hard

Disease Spread Modeling

The spread of an infection in a closed population is modeled by the differential equation $$\frac{dI

Easy

Epidemic Model: Logistic Growth of Infected Individuals

In a closed population, the spread of an infection is modeled by the logistic differential equation

Hard

Epidemic Spread Modeling

An epidemic in a closed population of 1000 individuals is modeled by the logistic equation $$\frac{d

Hard

Epidemic Spread with Limited Capacity

In a closed community, the number of infected individuals $$I(t)$$ (in people) is modeled by the log

Hard

Evaporation of a Liquid

A liquid evaporates from an open container and its volume $$V$$ (in liters) changes over time (in ho

Easy

Heating a Liquid in a Tank

A liquid in a tank is being heated by mixing with an incoming fluid whose temperature oscillates ove

Hard

Implicit Differential Equation and Asymptotic Analysis

Consider the differential equation $$\frac{dy}{dx}= \frac{y(1-y)}{x}$$ for $$x > 0$$ with the initia

Hard

Implicit IVP with Substitution

Solve the initial value problem $$\frac{dy}{dx}=\frac{y}{x}+\frac{x}{y}$$ with $$y(1)=2$$. (Hint: Us

Hard

Integrating Factor Method

Consider the differential equation $$\frac{dy}{dx} + 2y = e^{-x}$$ with the initial condition $$y(0)

Medium

Logistic Equation with Harvesting

A fish population in a lake is modeled by the logistic equation with harvesting: $$\frac{dP}{dt}=rP\

Hard

Logistic Growth Model Analysis

A population $$y(t)$$ grows according to the logistic differential equation $$\frac{dy}{dt} = k * y

Hard

Logistic Growth Model for Population Dynamics

A population $$P$$ is modeled by the logistic differential equation $$\frac{dP}{dt}=0.5*P\left(1-\fr

Hard

Logistic Population Growth

A population $$P(t)$$ grows according to the logistic model $$\frac{dP}{dt}=0.3P\Bigl(1-\frac{P}{100

Hard

Mixing of a Pollutant in a Lake

A lake with a constant volume of $$10^6$$ m\(^3\) receives polluted water from a river at a rate of

Medium

Mixing Tank Problem

A tank initially contains $$100$$ liters of pure water. A salt solution with a concentration of $$0.

Hard

Motion Along a Curve with Implicit Differentiation

A particle moves along the curve defined by $$x^2+ y^2- 2*x*y= 1$$. At a certain instant, its horizo

Medium

Newton's Law of Cooling

A hot object is placed in a room with constant temperature $$20^\circ C$$. Its temperature $$T$$ sat

Medium

Nonlinear Cooling of a Metal Rod

A thin metal rod cools in an environment at $$15^\circ C$$ according to the differential equation $$

Extreme

Population Dynamics with Harvesting

A fish population is governed by the differential equation $$\frac{dP}{dt} = 0.4*P\left(1-\frac{P}{1

Hard

Population with Constant Harvesting

A fish population in a lake grows according to the differential equation $$\frac{dy}{dt} = r*y - H$$

Medium

Radioactive Decay

A radioactive substance decays according to $$\frac{dy}{dt} = -0.05\,y$$ with an initial mass of $$y

Easy

Radioactive Decay with Production

A radioactive substance decays while being produced at a constant rate, and its mass $$M(t)$$ (in kg

Medium

Radioactive Isotope in Medicine

A radioactive isotope used in medical imaging decays according to $$\frac{dA}{dt}=-kA$$, where $$A$$

Medium

Radioactive Material with Constant Influx

A laboratory receives radioactive waste material at a constant rate of $$3$$ g/day. Simultaneously,

Easy

Radioactive Material with Continuous Input

A radioactive substance decays at a rate proportional to its amount while being produced continuousl

Easy

RC Circuit Discharge

In an RC circuit, the voltage across a capacitor decays according to $$\frac{dV}{dt}=-\frac{1}{RC}V$

Easy

Reaction Rate Model: Second-Order Decay

The concentration $$C$$ of a reactant in a chemical reaction obeys the differential equation $$\frac

Hard

Related Rates: Shadow Length

A 2 m tall lamp post casts a shadow of a 1.8 m tall person who is walking away from the lamp post at

Easy

Separable Differential Equation involving $$y^{1/3}$$

Consider the differential equation $$\frac{dy}{dx} = y^{1/3}$$ with the initial condition $$y(8)=27$

Medium

Separable Differential Equation: Growth Model

Consider the separable differential equation $$\frac{dy}{dx} = 3*x*y$$ with the initial condition $$

Easy

Separable Differential Equation: y and x

Consider the differential equation $$\frac{dy}{dx} = \frac{x}{y}$$ with the initial condition $$y(1)

Easy

Slope Field Sketching for $$\sin(x)$$ Model

Given the slope field for the differential equation $$\frac{dy}{dx} = \sin(x)$$, sketch a solution c

Easy

Tank Mixing and Salt Concentration

A tank initially contains 100 L of solution with 5 kg of dissolved salt. A salt solution with concen

Medium

Temperature Regulation in a Greenhouse

The temperature $$T$$ (in °F) inside a greenhouse is recorded over time (in hours) as shown. The war

Medium
Unit 8: Applications of Integration

Arch of a Bridge

An arch of a bridge is modeled by the function $$y=10-0.5*(x-5)^2$$, where $$x$$ is in meters and th

Medium

Area Between a Function and Its Tangent

A function $$f(x)$$ and its tangent line at $$x=a$$, given by $$L(x)=m*x+b$$, are considered on the

Hard

Area Between an Exponential Function and a Linear Function

Consider the functions $$f(x)=e^{x}$$ and $$g(x)=x+1$$ on the interval $$[0,1]$$.

Medium

Area Between Curves in an Ecological Study

In an ecological study, the population densities of two species are modeled by the functions $$P_1(x

Hard

Area Between Curves: River Cross-Section

A river's cross-sectional profile is modeled by two curves. The bank is represented by $$y = 10 - 0.

Medium

Average Density of a Rod

A rod of length $$10$$ cm has a linear density given by $$\rho(x)= 4 + x$$ (in g/cm) for $$0 \le x \

Medium

Average Force and Work Done on a Spring

A spring is compressed according to Hooke's Law, where the force required to compress the spring is

Easy

Average Temperature Analysis

A researcher models the temperature during a day using the function $$T(t)=10+15*\sin\left(\frac{\pi

Easy

Average Temperature Analysis

A local weather station recorded the temperature throughout a day using the model $$T(t)=-0.5*t+35$$

Easy

Average Value Calculation for a Polynomial Function

Consider the function $$f(x)=2*x^2-3*x+1$$ defined on the interval $$[0,5]$$. Compute the average va

Medium

Cooling Process Analysis

A cup of coffee cools in a room, and its temperature (in °C) is modeled by $$T(t)=30*e^{-0.1*t}+5$$

Hard

Determining Velocity and Position from Acceleration

A particle moves along a line with acceleration given by $$a(t)=4-2*t$$ (in $$m/s^2$$). At time $$t=

Medium

Discontinuities in a Piecewise Function

Consider the function $$f(x)=\begin{cases} \frac{\sin(x)}{x} & \text{if } x \neq 0 \\ 2 & \text{if }

Easy

Filling a Container: Volume and Rate of Change

Water is being poured into a container such that the height of the water is given by $$h(t)=2*\sqrt{

Easy

Finding the Area Between Two Curves

Let the functions $$f(x)=5*x-x^2$$ and $$g(x)=x$$ be given. Find the area of the region bounded by t

Medium

Free Workout Class Attendance

The attendance at a free workout class increases by a fixed number of people each session. The first

Easy

Hollow Rotated Solid

Consider the region in the first quadrant bounded by the curves $$y=x$$ and $$y=x^2$$. This region i

Medium

Implicit Differentiation in an Electrical Circuit

In an electrical circuit, the voltage $$V$$ and current $$I$$ are related by the equation $$V^2 + (3

Hard

Manufacturing Output Increase

A factory produces goods with weekly output that increases by a constant number of units each week.

Easy

Motion along a Straight Path

A particle moving along the x-axis has its acceleration given by $$a(t)=6-4*t$$ (in m/s²) for $$t \g

Medium

Particle Motion with Exponential Acceleration

A particle moves along a straight line with acceleration given by $$a(t)=2*e^{-t} - 1$$ (in m/s²) fo

Hard

Pipeline Installation Cost Analysis

The cost to install a pipeline along a route is given by $$C(x)=100+5*\sin(x)$$ (in dollars per mete

Medium

Population Growth with Variable Growth Rate

A city's population changes with time according to a non-constant growth rate given in thousands per

Medium

Population Model Using Exponential Function

A bacteria population is modeled by $$P(t)=100*e^{0.03*t} - 20$$, where $$t$$ is measured in hours.

Hard

River Current Analysis

The velocity of a river is given by $$v(x)=2+x-0.1*x^2$$ (in m/s) for 0 ≤ x ≤ 10, where x measures t

Hard

Total Distance Traveled from a Velocity Profile

A particle’s velocity over the interval $$[0, 6]$$ seconds is given in the table below. Note that th

Hard

Voltage and Energy Dissipation Analysis

The voltage across an electrical component is modeled by $$V(t)=12*e^{-0.1*t}*\ln(t+2)$$ (in volts)

Hard

Volume by the Cylindrical Shells Method

A region bounded by $$y=\ln(x)$$, $$y=0$$, and the vertical line $$x=e$$ is rotated about the y-axis

Hard

Volume of a Solid of Revolution using Shells

Consider the region under the curve $$f(x)=e^{-x}$$ for $$x \in [0,1]$$. This region is revolved abo

Medium

Volume of a Solid of Revolution Using the Disk Method

Consider the region bounded by the graph of $$f(x)=\sqrt{x}$$, the x-axis, and the vertical line $$x

Easy

Volume of a Solid with Square Cross-Sections

A solid has a base in the xy-plane bounded by $$y=x$$ and $$y=x^2$$ for $$0 \le x \le 1$$. Every cro

Hard

Water Flow into a Reservoir

Water flows into a reservoir at a rate given by $$R(t)= 20 - 2*t$$ cubic meters per hour, where $$t$

Medium

Work to Pump Water from a Cylindrical Tank

A cylindrical tank with a radius of 3 m and a height of 10 m is completely filled with water (densit

Hard

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Need to review before working on AP Calculus AB FRQs?

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Where can I find practice free response questions for the AP Calculus AB exam?
The free response section of each AP exam varies slightly, so you’ll definitely want to practice that before stepping into that exam room. Here are some free places to find practice FRQs :
  • Of course, make sure to run through College Board's past FRQ questions!
  • Once you’re done with those go through all the questions in the AP Calculus ABFree Response Room. You can answer the question and have it grade you against the rubric so you know exactly where to improve.
  • Reddit it also a great place to find AP free response questions that other students may have access to.
How do I practice for AP AP Calculus AB Exam FRQs?
Once you’re done reviewing your study guides, find and bookmark all the free response questions you can find. The question above has some good places to look! while you’re going through them, simulate exam conditions by setting a timer that matches the time allowed on the actual exam. Time management is going to help you answer the FRQs on the real exam concisely when you’re in that time crunch.
What are some tips for AP Calculus AB free response questions?
Before you start writing out your response, take a few minutes to outline the key points you want to make sure to touch on. This may seem like a waste of time, but it’s very helpful in making sure your response effectively addresses all the parts of the question. Once you do your practice free response questions, compare them to scoring guidelines and sample responses to identify areas for improvement. When you do the free response practice on the AP Calculus AB Free Response Room, there’s an option to let it grade your response against the rubric and tell you exactly what you need to study more.
How do I answer AP Calculus AB free-response questions?
Answering AP Calculus AB free response questions the right way is all about practice! As you go through the AP AP Calculus AB Free Response Room, treat it like a real exam and approach it this way so you stay calm during the actual exam. When you first see the question, take some time to process exactly what it’s asking. Make sure to also read through all the sub-parts in the question and re-read the main prompt, making sure to circle and underline any key information. This will help you allocate your time properly and also make sure you are hitting all the parts of the question. Before you answer each question, note down the key points you want to hit and evidence you want to use (where applicable). Once you have the skeleton of your response, writing it out will be quick, plus you won’t make any silly mistake in a rush and forget something important.