Foundation November 2018 Paper 1 Q14
14
(a) Find the value of \(x\) in each of the following.
(i) \(a^4 \times a^3 = a^x\) [1]
(ii) \((b^4)^3 = b^x\) [1]
(b) Factorise fully.
\(18x^2 + 9x\) [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| (i) 7 cao | 1 | Do not allow a7 or \(a^7\) | |
| (ii) 12 cao | 1 | Do not allow \(b\)12 or \(b^{12}\) | |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(9x(2x + 1)\) final answer | 2 | B1 for \(9(2x^2 + x)\) or \(x(18x + 9)\) or \(3x(6x + 3)\) or \(3(6x^2 + 3x)\) | condone final bracket missing |