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, $\frac{a_7}{a_{13}} = 2^3 = 8$.