Binomial TheoremHard

Question

is equal to -

Options

A.4n - 3n + 1
B.4n - 3n - 1
C.4n - 3n + 2
D.4n - 3n

Solution


= [rC0 + rC1 . 2 + ....... + rCr - 1 2r - 1]  = (3r - 2r) = 4n - 3n

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