The coefficient of x in the expansion of (1 x/2) 5 (a + x) 4 is
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The coefficient of x² in the expansion of (1− x/2)5 − (a + x)4 is 2a where a > 0. Find a.
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ANSWER We can expand the first expression using the binomial theorem 1x25 1 5x2 25x216 ...View the full answer
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Related Book For 
Complete Pure Mathematics 1 For Cambridge International AS & A Level
ISBN: 9780198427438
2nd Edition
Authors: Jean Linsky, Brian Western, James Nicholson
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