June 2017 Paper 2 Q4
4 Solve \(\qquad \dfrac{56}{\sqrt[3]{x}} = 4\) [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| \(\left(\dfrac{56}{4}\right)^3\) or \(14^3\) or \(4^3x = 56^3\) or \(64x = 175\,616\) or \(\dfrac{56^3}{x} = 4^3\) | M1 | oe oe equation in \(x^{(1)}\) or \(\dfrac{1}{x^{(1)}}\) |
| 2744 | A1 |
Additional guidance
| \(\sqrt[3]{x} = \dfrac{56}{4}\) or \(\sqrt[3]{x} = 14\) with no correct further work | M0 |
| \(56x^{-\frac{1}{3}} = 4\) | M0 |
| Solving \(\dfrac{56}{3x} = 4\) | M0 |
| Answer \(14^3\) with 2744 not seen in working | M1A0 |
| Embedded solution | M1A0 |