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Mathematics · 2024 · 1 mark
CBSE 2024 · Region 4 · Set 2 · Q5
If A = [1, 3; 3, 4] and A^2- kA -5 I = O, then the value of k is:
If $\displaystyle \mathrm{A}=\left[\begin{array}{ll}1 & 3 \\ 3 & 4\end{array}\right]$ and $\displaystyle \mathrm{A}^{2}-\mathrm{kA}-5 \mathrm{I}=\mathrm{O}$, then the value of k is :
Official answer
(B)
$\displaystyle 5$
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CBSE Class 12 Mathematics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.