The coefficient of x 2 in the expansion of (1 + ax) 4 is 30 times the
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The coefficient of x2 in the expansion of (1 + ax)4 is 30 times the coefficient of x in the expansion of 
Find the value of a.
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The general term in the binomial expansion of 1ax4 is given by Tr C4r 14r axr C4r ar ...View the full answer
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Related Book For 
Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook
ISBN: 9781108407144
1st Edition
Authors: Sue Pemberton, Julian Gilbey
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