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JEE PYQ: Binomial Theorem Question 23

Question 23 - 2020 (04 Sep Shift 1)

Let $(2x^2 + 3x + 4)^{10} = \sum_{r=0}^{20} a_r x^r$. Then $\frac{a_7}{a_{13}}$ is equal to ____.

Show Answer

Answer: 8

Solution

After detailed multinomial computation, $\frac{a_7}{a_{13}} = 2^3 = 8$.


Learning Progress: Step 23 of 55 in this series