Skip to content

Course home

A Level
Maths WJEC
Question bank

Differentiation

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90

Question 75

A curve has the equation $2x^2 + xy + 2y^2 = 20$

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

a.

Show that $x - y = 0$ at $R\,$ and $S$ .

[6]

b.

Find the coordinates of $R\,$ and $S$ .

[3]

Differentiation Questions

A Level
Maths
Differentiation