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Longhand

Chapter 4: Towards integral calculus

Antiderivatives

An antiderivative is a function whose derivative you know. Finding one means reading the differentiation rules backwards, remembering that there is always a whole family of them, and using a given value to pick the one that fits. Velocity back to position is the standard application.

This topic is in CLP-1 but not in the current MATH 100 syllabus. It is here for students who want it; it will not be on a test.

Practice questions

Every question below is original material written for Longhand. Open a solution to read the full working, or answer it yourself to have it counted towards your progress.

  • Introductory2 marks · 3 min

    A function FF satisfies F(x)=6x24x+1F'(x) = 6x^{2} - 4x + 1 and F(0)=2F(0) = 2. Find F(1)F(1).

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  • Introductory1 mark · 2 min

    Which of the following is the most general antiderivative of f(x)=3sinx2f(x) = 3\sin x - 2?

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  • Introductory2 marks · 3 min

    A function FF is defined for x<0x < 0 and satisfies F(x)=1xF'(x) = \dfrac{1}{x} there. Which of the following gives every such FF?

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  • Standard3 marks · 4 min

    Find the function ff with f(x)=4cos(2x)+exf'(x) = 4\cos(2x) + e^{x} and f(0)=1f(0) = 1, and evaluate f ⁣(π2)f\!\left(\dfrac{\pi}{2}\right).

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  • Standard3 marks · 4 min

    A function FF satisfies F(x)=31+9x2F'(x) = \dfrac{3}{1 + 9x^{2}} and F(0)=0F(0) = 0. Find F ⁣(13)F\!\left(\dfrac{1}{3}\right).

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  • Standard3 marks · 5 min

    A ball is thrown straight up from a height of 1 m with an initial velocity of 14.7 m/s. Its acceleration is a constant 9.8-9.8 m/s². Find the maximum height it reaches.

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  • Standard2 marks · 4 min

    A colony of bacteria grows at a rate of 200e0.1t200e^{0.1t} individuals per hour, where tt is measured in hours. By how much does the colony grow during the first 5 hours?

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  • Challenging3 marks · 5 min

    A function FF satisfies F(x)=6x2ex3F'(x) = 6x^{2}e^{x^{3}} and F(0)=0F(0) = 0. Find F(1)F(1).

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  • Challenging3 marks · 5 min

    A function ff satisfies f(x)=12x6f''(x) = 12x - 6, f(1)=2f'(1) = 2 and f(0)=5f(0) = 5. Find f(2)f(2).

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  • Capstone5 marks · 8 min

    A function ff is defined for all x0x \neq 0 and satisfies f(x)=1xf'(x) = \dfrac{1}{x} for every x0x \neq 0, with f(1)=0f(-1) = 0 and f(1)=3f(1) = 3. Find f(e)+f(e)f(-e) + f(e).

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