The first 3 terms in the expansion of (a 5x) 2 are 1/4 + 5/4x +
Question:
The first 3 terms in the expansion of (a − 5x)−2 are 1/4 + 5/4x + bx2. Find the value of a, the value of b and the term in x3.
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We can use the binomial theorem to expand a 5x2 a 5x2 1 25xa 35x2a2 45x3a3 We are given ...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook
ISBN: 9781108407199
1st Edition
Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey
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