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Binomial Expansion

Binomial Expansion

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Question 212
a.

Verify that the first three terms in the binomial expansion of (1+3x)12\displaystyle (1 + 3x)^{\frac{1}{2}}(1+3x)21​ are 1+32x−98x2\displaystyle 1 + \frac{3}{2}x - \frac{9}{8}x^21+23​x−89​x2

[3]
b.

Verify that the expansion is valid for ∣x∣<13\displaystyle |x| < \frac{1}{3}∣x∣<31​

[1]
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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