Let ^nC_r denote the binomial coefficient of x^r in the expansion of (1+x)^n. If _ k=0 ^ 10 (2^2+3k) ^nC_k=...

Question

Let ^nC_r denote the binomial coefficient of x^r in the expansion of (1+x)^n. If _ k=0 ^ 10 (2^2+3k) ^nC_k= .3^ 10 + .2^ 10 , , R, then + is equal to _______.

Accepted Answer

19

JEE Main 2021 Mathematics question

Solution

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