Foundation January 2020 Paper 2 Q17
17
(a) Simplify \(\quad \dfrac{x^9}{x^2}\) (1)
(b) Write \(\;\dfrac{7^8 \times 7^4}{7^3}\;\) as a single power of 7 (2)
| Scheme | Marks |
|---|---|
| \(x^7\) | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| eg \(7^8 \times 7^4 = 7^{12}\) or \(7^8 \div 7^3 = 7^5\) or \(7^5 \times 7^4\) or \(7^4 \div 7^3 = 7\) or \(7^8 \times 7\) or \(7^{\text{‘}12\text{’}} \div 7^3 = 7^{\text{‘}12\text{’} - 3}\) | M1 |
| \(7^9\) | A1 |
| (2) | |
| (3 marks) |
Notes
M1: for one correct step – must be written as a power of 7
A1: for \(7^9\)