The sum of the series ^ 4 C_0 + ^ 5 C_1x + ^ 6 C_2x^2 + ^ 7 C_3x^3 + to is

JEE Advanced Mathematics question

The sum of the series to is

Answer: (B)

The general term is . Since x)^{-n}C_0C_1xC_2x^2$

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Question ID VK-108404