Mathematics · 2024
JEE Main · 27 January 2024, Shift 2 · Q22
Let A be a 2 × 2 real matrix and I be the identity matrix of order 2. If the roots of the equation | A -x I |=0 be -1 and 3, then the sum of the…
Let A be a $\displaystyle 2 \times 2$ real matrix and I be the identity matrix of order 2. If the roots of the equation $\displaystyle |\mathrm{A}-x \mathrm{I}|=0$ be -$\displaystyle 1$ and $\displaystyle 3$, then the sum of the diagonal elements of the matrix $\displaystyle \mathrm{A}^2$ is $\displaystyle \_\_\_\_$.
Official answer
From NTA’s final answer key for this paper.
10
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JEE Main 2024 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.