Binomial TheoremHard

Question

If ′a′ be the sum of the odd terms & ′b′ be the sum of the even terms in the expansion of (1 + x)n, then (1-x2)n is equal to -

Options

A.a2 - b2
B.a2 + b2
C.b2 - a2
D.none

Solution

-

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