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1.7.1 Binomial expansion

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Question 45

In the expansion of (1+ax)6(1 + ax)^6(1+ax)6, where a a\,a is a positive constant, the coefficient of x2 x^2\,x2 is 60.

a.

Find the value of aaa.

[3]
b.

Hence find the coefficient of x3 x^3\,x3 in the expansion.

[2]
Markscheme

1.7.1 Binomial expansion Questions

  1. A Level
  2. /Maths
  3. /1.7.1 Binomial expansion

144 exam-style questions on AQA A Level Maths 1.7.1 Binomial expansion. Each one has a worked solution and a mark scheme showing where the marks go.

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