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Binomial Expansion

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Question 262

One of the terms in the binomial expansion of (2+bx)5(2 + bx)^5(2+bx)5, where b b\,b is a constant, is 720x2720x^2720x2.

a.

Find the possible values of bbb.

[3]
b.

Hence find the term independent of x x\,x in the expansion of

(14+1x5)(2+bx)5 \left( \frac{1}{4} + \frac{1}{x^5} \right) (2 + bx)^5 (41​+x51​)(2+bx)5
[3]
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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