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Binomial Expansion

Binomial Expansion

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Question 323
a.

Find the first three terms, in ascending powers of xxx, of the binomial expansion of

(3+kx)5 (3 + kx)^5 (3+kx)5

where kkk is a constant. Give each term in simplest form.

[3]
b.

Given that in the expansion of

(2−x)(3+kx)5 (2 - x)(3 + kx)^5 (2−x)(3+kx)5

the coefficient of x2x^2x2 is 135135135,

find the possible values of kkk.

[4]
Markscheme

Binomial Expansion Questions

  1. A Level
  2. /Maths
  3. /Binomial Expansion

408 exam-style questions on Edexcel A Level Maths Binomial Expansion, covering 4.1 Expanding (1 + x)^n, 4.2 Expanding (a + bx)^n, and 4.3 Using Partial Fractions. Each one has a worked solution and a mark scheme showing where the marks go.

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