In the expansion of (1+x)^ 50 , the sum of the coefficient of add power of x is

JEE Main Mathematics question

In the expansion of , the sum of the coefficient of add power of is

(A)Zero
(B)Correct
(C)
(D)

Answer: (B)

Solution

The sum of all coefficients is (at ), and the alternating sum is (at ). Adding and subtracting these, the sum of the coefficients of the even powers and of

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Question ID VK-020996