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9.10 Rates of Change

9.10 Rates of Change

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Question 10

A curve has equation y=x3−27xy = x^3 - 27xy=x3−27x.

The point AAA on the curve has xxx-coordinate 333.

The point BBB on the curve has xxx-coordinate 3+h3 + h3+h.

a.

Show that the gradient of the line ABABAB is h2+9hh^2 + 9hh2+9h.

[5]
b.

Explain how the result of part (a) can be used to show that AAA is a stationary point on the curve.

[2]
Markscheme

9.10 Rates of Change Questions

  1. A Level
  2. /Maths
  3. /9.10 Rates of Change

24 exam-style questions on Edexcel A Level Maths 9.10 Rates of Change. Each one has a worked solution and a mark scheme showing where the marks go.

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