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JEE Main Mathematics question

MathematicsBinomial TheoremJEE Main

The coefficient of in the expansion of , is

Answer: (C)

Solution

, so the coefficient of in is $Missing argument for \binom\binom{n+2}2+2Missing argument for \binom\binom{n+1}2+Missing argument for \binom\binom

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Question ID VK-021181