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3.6 Differentiation (A-level only)

3.6 Differentiation (A-level only)

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Question 75

A curve has the equation 2x2+xy+2y2=202x^2 + xy + 2y^2 = 202x2+xy+2y2=20

The gradient of the tangent to the curve is -1 at the points R R\,R and SSS.

a.

Show that x−y=0x - y = 0x−y=0 at R R\,R and SSS.

[6]
b.

Find the coordinates of R R\,R and SSS.

[3]
Markscheme

3.6 Differentiation (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.6 Differentiation (A-level only)

333 exam-style questions on WJEC A Level Maths 3.6 Differentiation (A-level only), covering 3.6.1 Differentiation (A-level only), 3.6.2 Differentiation (A-level only), 3.6.3 Differentiation (A-level only), 3.6.4 Differentiation (A-level only), 3.6.5 Differentiation (A-level only), 3.6.6 Differentiation (A-level only), 3.6.7 Differentiation (A-level only), and 3.6 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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