Let a and b be two nonzero real numbers. If the coefficient of x^5 in the expansion of (a x^2+\frac{70}{27 b x}) ^4 is equal to the coefficient of x^{-5} in the expansion of (a x-\frac{1}{b x^2}) ^7, then the value of 2 b is [JEE Adv 2023 P1]

Mathematical Induction and Binomial Theorem

Section: Mathematics

Question : 2 of 8

Marks: +1, -0

Let a and b be two nonzero real numbers. If the coefficient of x5 in the expansion of (ax2+‌

27bx

)4 is equal to the coefficient of x−5 in the expansion of (ax−‌

bx2

)7, then the value of 2b is

[JEE Adv 2023 P1]

Go to Question:

Prev Question

Next Question