CBSE 2024 · Region 4 · Set 3 · Q4 · 1 mark
If $\displaystyle \mathrm{A}=\left[\begin{array}{cc}3 & 1 \\ -1 & 2\end{array}\right]$ and $\displaystyle \mathrm{A}^{2}+7 \mathrm{I}=\mathrm{kA}$, then the value of k is :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 5$
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CBSE Class 12 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.