June 2018 Paper 1 Q1
1 \(y = \dfrac{x^6}{2} + \dfrac{x^4}{4}\)
Work out \(\quad \dfrac{\mathrm{d}y}{\mathrm{d}x}\)
Simplify your answer. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(\dfrac{6x^5}{2}\) or \(3x^5\) or \(\dfrac{4x^3}{4}\) or \(x^3\) | M1 | oe eg \(\dfrac{12x^5}{4}\) |
| \(3x^5 + x^3\) | A1 | or a correct factorised version eg \(x^3(3x^2 + 1)\) |
Additional guidance
| Do not ignore further work, eg correct answer followed by \(4x^8\) scores M1 A0 They must use the powers of \(x\) as given in the question, so no misread possible here |