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JEE PYQ: Binomial Theorem Question 46

Question 46 - 2019 (09 Jan Shift 2)

The coefficient of $t^4$ in the expansion of $\left(\frac{1-t^6}{1-t}\right)^3$ is:

(1) 14 (2) 15 (3) 10 (4) 12

Show Answer

Answer: (2)

Solution

Coefficient of $t^4$ in $(1-t)^{-3} = \binom{6}{2} = 15$.


Learning Progress: Step 46 of 55 in this series