Binomial TheoremHard

Question

The coefficient of xn in polynomial (x + 2n+1C0) (x + 2n+1C1)........(x + 2n+1Cn) is -

Options

A.2n + 1
B.22n+1 - 1
C.22n
D.22n

Solution

Co-efficient  of xn = 2n+1C0 + 2n+1C1 + ..... + 2n+1Cn = 22n 

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