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JEE Main 2014 Mathematics question

MathematicsBinomial TheoremJEE Main 2014

If is expanded in the ascending powers of x and the coefficients of powers of x in two consecutive terms of the expansion are equal, then these terms are:

Answer: (2)

Solution

The coefficient of is . Equating it to the coefficient of gives , i.e. \binom{55}{r}$ =

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Question ID VK-104591