Mathematics · 2023
JEE Main · 10 April 2023, Shift 1 · Q5
If the coefficient of x^7 in (a x-1/(b x^2))^13 and the coefficient of x^-5 in (a x+1/(b x^2))^13 are equal, then a^4 b^4 is equal to:
If the coefficient of $\displaystyle x^7$ in $\displaystyle \left(a x-\frac{1}{b x^2}\right)^{13}$ and the coefficient of $\displaystyle x^{-5}$ in $\displaystyle \left(a x+\frac{1}{b x^2}\right)^{13}$ are equal, then $\displaystyle a^4 b^4$ is equal to:
Official answer
From NTA’s final answer key for this paper.
(2)
$\displaystyle 22$
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JEE Main 2023 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.