Mathematics · 2020
JEE Main · 6 September 2020, Shift 2 · Q55
If the constant term in the binomial expansion of (√ x -k/x^2)^10 is 405, then |k| equals:
If the constant term in the binomial expansion of $\displaystyle \left(\sqrt{x}-\frac{k}{x^2}\right)^{10}$ is $\displaystyle 405$ , then $\displaystyle |k|$ equals :
Official answer
(2)
$\displaystyle 3$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.