4MA0 Foundation January 2012 Paper 2 Q21
21
(a) Simplify \(c^4 \times c^3\) (1)
(b) \[\frac{y^3 \times y^n}{y} = y^6\]Find the value of \(n\). (2)
| Scheme | Marks |
|---|---|
| \(c^7\) | B1 |
| (1) |
Notes
B1: cao
| Scheme | Marks |
|---|---|
\(y^{3+n-1} = y^6\) oe or \(y^{3+n} = y^7\) oe or \(3 + n - 1 = 6\) oe or \(y^n = \dfrac{y^7}{y^3}\) or \(y^n = \dfrac{y^6}{y^2}\) or \(y^n = y^4\) | M1 |
| 4 | A1 |
| (2) | |
| (Total 3 marks) |
Notes
M1: SC if M0, award B1 for an answer of \(y^4\)
A1: cao