Binomial TheoremMedium
Question
Coefficients of xr [0 ≤ r ≤ (n − 1)] in the expansion of (x + 3)n−1 + (x + 3)n−2 (x + 2) + (x + 3)n−3 (x + 2)2 + ........ + (x + 2)n−1 -
Options
A.nCr (3r − 2n)
B.nCr (3n−r − 2n−r)
C.nCr (3r + 2n−r)
D.None of these
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