Higher June 2017 Paper 1 Q12
12
(a) Find the value of \(81^{-\frac{1}{2}}\) (2)
(b) Find the value of \(\left(\dfrac{64}{125}\right)^{\frac{2}{3}}\) (2)
| Answer | Mark | Notes |
|---|---|---|
| \(\dfrac{1}{9}\) | M1 | for showing a method using either reciprocal or square root e.g. \(\dfrac{1}{n}\) or 9 seen |
| A1 | cao Accept \(\pm\dfrac{1}{9}\) or 0.1 recurring |
| Answer | Mark | Notes |
|---|---|---|
| \(\dfrac{16}{25}\) | M1 | for showing cube root of 64 as 4 and the cube root of 125 as 5 or \(\dfrac{16}{n}\ (n \ne 25)\) or \(\dfrac{n}{25}\ (n \ne 16)\) or an intention to find the cube root and square. |
| A1 | cao Accept 0.64 |