JEE Main Mathematics question

MathematicsBinomial TheoremJEE Main

Let the coefficients of third, fourth and fifth terms in the expansion of , , be in the ratio . Then the term independent of in the expansion, is equal to

Answer: 3.75

Solution

The coefficients are , so and , i.e. and . Dividing, gives , and then (check:

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Question ID VK-021369