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3.6 Differentiation (A-level only)

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Question 2

A curve has the equation $x^2 - xy + y^2 = 12$

The gradient of the tangent to the curve is 1 at the points $P\,$ and $Q$ .

Show that $x + y = 0$ at $P\,$ and $Q$ .

[6]

Find the coordinates of $P\,$ and $Q$ .

[3]

Markscheme

3.6 Differentiation (A-level only) Questions

A Level
Maths
3.6 Differentiation (A-level only)

332 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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