Math miscellaneousHard

Question

Coefficient of x10 in the expansion of (1 + x)9 ln (1 + x), is (where |x| < 1)

Options

A.0
B.
C.
D.

Solution

(l n(1 + x))9Crxr
9Crxr
coefficient of
x10 = 9C9
i.e.(-1)r =

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