Binomial TheoremHard
Question
The sum of the co-efficients in the expansion of (1 - 2x + 5x2)n is ′a′ and the sum of the co-efficients in the expansion of (1 + x)2n is b. Then -
Options
A.a = b
B.a = b2
C.a2 = b
D.ab = 1
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