Let C_r denote the coefficient of x^r in the binomial expansion of (1+x)^n, n N , 0 r n. If P_n = C_0 - C_1 +...

Question

Let C_r denote the coefficient of x^r in the binomial expansion of (1+x)^n, n N , 0 r n. If P_n = C_0 - C_1 + 2^2 3 C_2 - 2^3 4 C_3+ + (-2)^n n+1 C_n, then the value of _ n=1 ^ 25 1 P_ 2n equals.

Accepted Answer

(4)

JEE Main 2026 Mathematics question

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