a) Write down the expansion of (1 + x) 5 . b) By letting x = y
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a) Write down the expansion of (1 + x)5.
b) By letting x = y + y², find the coefficient of y8 in the expansion of (1 + y + y²)5.
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ANSWER a The expansion of 1 x5 can be found by using the binomial theorem 1 ...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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