1MA0 Higher November 2012 Paper 2 Q20
20 Simplify \(\dfrac{x + 1}{2} + \dfrac{x + 3}{3}\) (3)
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(\dfrac{3(x + 1)}{6} + \dfrac{2(x + 3)}{6} = \dfrac{3x + 3 + 2x + 6}{6}\) | \(\dfrac{5x + 9}{6}\) | 3 | M1 Use of common denominator of 6 (or any other multiple of 6) and at least one numerator correct Eg. \(\dfrac{3(x + 1)}{6}\) or \(\dfrac{2(x + 3)}{6}\) M1 \(\dfrac{3(x + 1)}{6} + \dfrac{2(x + 3)}{6}\) oe A1 cao |