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Binomial Expansion

Binomial Expansion

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Question 200
a.

Find the first three terms of the expansion of (9+kx)−12\displaystyle (9 + kx)^{-\frac{1}{2}}(9+kx)−21​ in ascending powers of xxx.

[4]
b.

The expansion of a+bx9+kx\displaystyle \frac{a + bx}{\sqrt{9 + kx}}9+kx​a+bx​ is 3+x…3 + x \dots3+x… Find the values of the constants a a\,a and b b\,b in terms of kkk.

[3]
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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