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9.3 The Chain Rule

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Question 25

The point P P\,P lies on the curve with equation y=4x+1\displaystyle y = \frac{4}{\sqrt{x + 1}}y=x+1​4​ with x x\,x coordinate 8

a.

Find an equation to the tangent to the curve at the point PPP.

[5]
b.

The tangent intersects the x x\,x axis at the point A A\,A and the y y\,y axis at the point BBB. Find the exact area of the triangle AOBAOBAOB, where O O\,O is the origin.

A coordinate sketch shows a decreasing curve and its tangent at P, with the tangent meeting the axes at A and B and O marking the origin.

[4]
Markscheme

9.3 The Chain Rule Questions

  1. A Level
  2. /Maths
  3. /9.3 The Chain Rule

58 exam-style questions on Edexcel A Level Maths 9.3 The Chain Rule. Each one has a worked solution and a mark scheme showing where the marks go.

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