The coefficient of x 2 in the expansion of (1 + x/5) n , where n is
Question:
The coefficient of x2 in the expansion of (1 + x/5)n, where n is a positive integers is 3/5.
a. Find the value of n.
b. Using this value of n, find the term independent of x in the expansion of
(1 + x/5)n (2 – 3/x)2.
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Step by Step Answer:
a The coefficient of x2 in the expansion of 1 x5n is 35 To find the value of n we can use the ...View the full answer
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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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