Foundation November 2018 Paper 1 Q19
19 \(a = 7\) and \(b = 2\)
Work out the value of \(\quad \dfrac{a}{b} - a^b\) [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| 3.5 or \(3\dfrac{1}{2}\) or 49 or \((49 =)\ \dfrac{98}{2}\) | M1 | |
| \(3.5 - 49\) or \(49 - 3.5\) or \(3\dfrac{1}{2} - 49\) or \(49 - 3\dfrac{1}{2}\) or \(\dfrac{7}{2} - \dfrac{98}{2}\) or \(\dfrac{98}{2} - \dfrac{7}{2}\) | M1dep | 45.5 (oe) implies M2 |
| \(-45.5\) or \(-45\dfrac{1}{2}\) or \(-\dfrac{91}{2}\) | A1 |
Additional guidance
| \(\dfrac{7}{2}\) without \(\dfrac{98}{2}\) | M0 |
| \(7^2\) without 49 | M0 |
| \(\dfrac{7}{2} - 7^2\) (no further correct work) | M0 |
| \(7^2 = 14\), \(3.5 - 14 = -10.5\) | M1M0A0 |
| \(\dfrac{7}{2} - 49\) | M1 |
| \(3.5 - 7^2\) | M1 |