The coefficient of x 3 in the expansion of (3 + ax) 5 is 12 times the
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The coefficient of x3 in the expansion of (3 + ax)5 is 12 times the coefficient of x2 in the expansion of (1 + ax/2)4. Find the value of a.
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Related Book For 
Cambridge IGCSE And O Level Additional Mathematics Coursebook
ISBN: 9781108411660
2nd Edition
Authors: Sue Pemberton
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