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9.8 Implicit Differentiation

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Question 1

A curve has the equation x2+xy+2y2=14x^2 + xy + 2y^2 = 14x2+xy+2y2=14

The gradient of the tangent to the curve is −13\displaystyle -\frac{1}{3}−31​ at the points A A\,A and BBB.

a.

Show that 5x−y=05x - y = 05x−y=0 at A A\,A and BBB.

[6]
b.

Find the coordinates of A A\,A and BBB.

[3]
Markscheme

9.8 Implicit Differentiation Questions

  1. A Level
  2. /Maths
  3. /9.8 Implicit Differentiation

47 exam-style questions on Edexcel A Level Maths 9.8 Implicit Differentiation. Each one has a worked solution and a mark scheme showing where the marks go.

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