AP Calculus AB Integration by Substitution Worksheet (PDF)

AP Calculus AB math worksheet: Integration by Substitution – Maths PDFCover of the book AP Calculus AB Math Worksheets with Answers (PDF)Download as a PDFThe AP Calculus AB worksheets book with answersPrintable PDFSee the book ›


This u substitution worksheet for AP Calculus AB covers integration by substitution (Common Core AP CALC AB 6.9, AP CALC AB 6.10, AP CALC AB 6.11, AP CALC AB 6.12, AP CALC AB 6.14), with a free PDF to print.

These 23 problems practice integration by u-substitution for indefinite and definite integrals, long division, completing the square and choosing a technique (AP Calculus AB, topics 6.9 to 6.14). The early problems build the basic skill, and each one uses a different function or situation so that no two feel alike.

Later problems use exponential, trig and logarithmic forms, definite integrals with new limits, and situations such as a growing colony and a charging battery. Work in pencil, show every step, and check the answer key only after a full attempt.

AP Calculus AB · Common Core State Standards: AP CALC AB 6.9, AP CALC AB 6.10, AP CALC AB 6.11, AP CALC AB 6.12, AP CALC AB 6.14

U substitution worksheet: exercises 1 to 10

Exercise 1 – A power of a quadratic

Find \(\int 2x(x^{2}+1)^{3}\,dx\).

Exercise 2 – A square root

Find \(\int x\sqrt{x^{2}+4}\,dx\).

Exercise 3 – Cosine of a multiple

Find \(\int\cos(3x)\,dx\).

Exercise 4 – Exponential of a multiple

Find \(\int e^{5x}\,dx\).

Exercise 5 – Exponential with a quadratic

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The area under x e^(x²) from 0 to 1.

Find \(\int xe^{x^{2}}\,dx\) and use it to find the shaded area \(\int_{0}^{1}xe^{x^{2}}\,dx\).

Exercise 6 – Sine times a power of cosine

Find \(\int\sin x\cos^{2}x\,dx\).

Exercise 7 – Logarithm over x

Find \(\int\frac{\ln x}{x}\,dx\).

Exercise 8 – Reciprocal of a linear function

Find \(\int\frac{1}{2x+3}\,dx\).

Exercise 9 – Quotient with a quadratic

Find \(\int\frac{x}{x^{2}+1}\,dx\).

Exercise 10 – Integral of tangent

Find \(\int\tan x\,dx\).

Exercises 11 and up

Exercise 11 – Exponential over one plus exponential

Find \(\int\frac{e^{x}}{1+e^{x}}\,dx\).

Exercise 12 – Secant squared of a multiple

Find \(\int\sec^{2}(2x)\,dx\).

Exercise 13 – Inverse tangent form

Find \(\int\frac{1}{1+9x^{2}}\,dx\).

Exercise 14 – Cubic inside a power

Find \(\int x^{2}(x^{3}+1)^{4}\,dx\).

Exercise 15 – Definite integral with changed limits

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The area under x(x² + 1)³ on [0, 2].

Evaluate \(\int_{0}^{2}x(x^{2}+1)^{3}\,dx\) by changing the limits.

Exercise 16 – Definite integral, trig

Evaluate \(\int_{0}^{\pi/2}\sin x\cos x\,dx\).

Exercise 17 – Definite integral, logarithm

0.511.522.530.10.20.30.40.5xy
The area under (ln x)/x from 1 to e.

Evaluate \(\int_{1}^{e}\frac{\ln x}{x}\,dx\).

Exercise 18 – Definite integral, rational

Evaluate \(\int_{-1}^{1}\frac{x^{2}}{x^{3}+2}\,dx\).

Exercise 19 – Long division

Find \(\int\frac{x^{2}+3x+1}{x+1}\,dx\).

Exercise 20 – Completing the square

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The graph of 1/(x² + 4x + 13).

Find \(\int\frac{1}{x^{2}+4x+13}\,dx\).

Exercise 21 – Colony growth

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Growth rate of a bacteria colony per hour.

A colony grows at the rate \(r(t)=200te^{-0.1t^{2}}\) bacteria per hour. How many bacteria are added during the first 3 hours?

Exercise 22 – Battery charge

The current into a battery is \(I(t)=5e^{-0.5t}\) amps. Find the charge delivered in the first 4 hours (charge is the integral of current).

Exercise 23 – Distance from a velocity

A drone has velocity \(v(t)=3t\sqrt{t^{2}+16}\) ft/s. Find the distance traveled from \(t=0\) to \(t=3\) seconds.

See the solutions: Integration by Substitution worksheet solutions

Key facts behind this u substitution worksheet

Key facts
  • Let u = g(x) and du = g′(x) dx, then the integral becomes the integral of f(u) du.
  • Adjust constant factors: if du is off by a constant, divide or multiply to compensate.
  • For definite integrals, change the limits to u-values or return to x before evaluating.
  • Use long division for improper rational functions and completing the square for irreducible quadratics.

How to use this u substitution worksheet

Work through the exercises in order: they go from simple to challenging. Write every step on paper, then compare with the solutions page and redo any exercise you missed the next day.

Download the u substitution worksheet as a PDF with the button below and keep it with your notes.

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AP Calculus AB Integration by Substitution Worksheet

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