Mathematics · 2022
JEE Main · 29 July 2022, Shift 2 · Q2
Which of the following matrices can NOT be obtained from the matrix [-1, 2; 1, -1] by a single elementary row operation?
Which of the following matrices can NOT be obtained from the matrix $\displaystyle \left[\begin{array}{cc}-1 & 2 \\ 1 & -1\end{array}\right]$ by a single elementary row operation ?
Official answer
(3)
$\displaystyle \left[\begin{array}{ll}
-1 & 2 \\
-2 & 7
\end{array}\right]$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.