Higher June 2018 Paper 2 Q11
11 f and g are functions such that
\(\mathrm{f}(x) = \dfrac{2}{x^2}\) and \(\mathrm{g}(x) = 4x^3\)
(a) Find \(\mathrm{f}(-5)\) (1)
(b) Find \(\mathrm{fg}(1)\) (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(\dfrac{2}{25}\) | B1 | accept 0.08 |
| Answer | Mark | Mark scheme |
|---|---|---|
| \(\dfrac{1}{8}\) | M1 | \(\mathrm{fg}(x) = \dfrac{2}{(4x^3)^2}\) oe or \(\mathrm{g}(1) = 4\) or \(\dfrac{2}{(4 \times 1^3)^2}\) oe |
| A1 | oe |
Additional guidance
All powers and products must be evaluated