What is the sum of the coefficients of first and last terms in the expansion of (1+x)^ 2n , where n is a natural number?

NDA 2021 Mathematics question

What is the sum of the coefficients of first and last terms in the expansion of , where is a natural number?

Answer: (B)

In the expansion of the first term is and the last term is . Both

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Question ID VK-033538