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1 Unit 1: Pure Mathematics A

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Question 212
a.

A materials scientist models the longitudinal strain ϵ\epsilonϵ in a composite beam using the function ϵ(h)=(14−3h)12\epsilon(h) = \left(\frac{1}{4} - 3h\right)^{\frac{1}{2}}ϵ(h)=(41​−3h)21​, where hhh is the applied load factor and ∣h∣<112|h| < \frac{1}{12}∣h∣<121​. Find the first 4 terms, in ascending powers of hhh, of the binomial expansion for ϵ(h)\epsilon(h)ϵ(h), giving each coefficient in its simplest form.

[4]
b.

By substituting h=1100h = \frac{1}{100}h=1001​ into the expansion found in (a), find an approximation for 22\sqrt{22}22​.

Give your answer in the form ab\frac{a}{b}ba​ where aaa and bbb are integers to be found.

[4]
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1 Unit 1: Pure Mathematics A Questions

  1. A Level
  2. /Maths
  3. /1 Unit 1: Pure Mathematics A

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