Question: a) Write down the expansion of (1 + x) 5 . b) By letting x = y + y, find the coefficient of y 8

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 full answer

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