a. Find the binomial expansion of (1 3x) 3/2 in ascending powers of x up to

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a. Find the binomial expansion of (1 − 3x)3/2 in ascending powers of x up to and including the x3 term, simplifying each term.

b. Show that, when x = 1/100, the exact value of (1 − 3x)3/2 is 

c. Substitute x =1/100 into the binomial expansion in part a and hence obtain an approximation to √97. Give your answer to 5 decimal places.

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Pearson Edexcel A Level Mathematics Pure Mathematics Year 2

ISBN: 9781292183404

1st Edition

Authors: Greg Attwood, Jack Barraclough, Ian Bettison, David Goldberg, Alistair Macpherson, Joe Petran

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