Mathematics 9709/13 — May/June 2011

Cambridge AS Level · Pure Mathematics 1 · worked solutions for every part, with the mark scheme

questions

marks

105

minutes

Topics Differentiation · Trigonometry · Series · Coordinate Geometry · Integration · Quadratics · +2 more

Q15MSeriesFree sample

The coefficient of $x^3$ in the expansion of $(a + x)^5 + (1 - 2x)^6$ , where $a$ is positive, is 90. Find the value of $a$ .

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