Binomial TheoremHard

Question

The value of m, for which the coefficients of the (2m + 1)th and (4m + 5)th terms in the expansion of (1 + x)10 are equal, is

Options

A.3
B.1
C.5
D.8

Solution

equal
2m + 4m + 4 = 10  ⇒   6m + 4 = 10
m = 1

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