Mathematics · 2021
JEE Main · 3 August 2021, Shift 2 · Q63
Let A =(a_i j) be a 3 × 3 matrix, where a_i j=7^max {i, j}. Then det A is equal to
Let $\displaystyle \mathrm{A}=\left(a_{i j}\right)$ be a $\displaystyle 3 \times 3$ matrix, where $\displaystyle a_{i j}=7^{\max \{i, j\}}$. Then $\displaystyle \operatorname{det} \mathrm{A}$ is equal to
Official answer
(3)
$\displaystyle 6^2 \cdot 7^6$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.