Mathematics · 2022
JEE Main · 27 June 2022, Shift 2 · Q4
Let A and B be two 3 × 3 matrices such that A B=I and |A|=1/8. Then | adj (B adj (2 A))| is equal to
Let $\displaystyle A$ and $\displaystyle B$ be two $\displaystyle 3$ × $\displaystyle 3$ matrices such that $\displaystyle A B=I$ and $\displaystyle |A|=\frac{1}{8}$. Then $\displaystyle |\operatorname{adj}(B \operatorname{adj}(2 A))|$ is equal to
Official answer
(3)
$\displaystyle 64$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.