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1 Pure Mathematics

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Question 351
a.

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

(25+5x)−12\displaystyle (25 + 5x)^{-\frac{1}{2}}(25+5x)−21​

giving each coefficient in its simplest form.

[4]
b.

Write down the range of values of x x\,x for which the expansion is valid.

[1]
Markscheme

1 Pure Mathematics Questions

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