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Binomial Expansion

Binomial Expansion

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Question 199
a.

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

1k+x \frac{1}{\sqrt{k + x}} k+x​1​

giving each coefficient in its simplest form, in terms of kkk, where k k\,k is a positive constant.

[3]
b.

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

1k−x2 \frac{1}{\sqrt{k - x^2}} k−x2​1​
[2]
Markscheme

Binomial Expansion Questions

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

409 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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