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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 1 · Set 1 · Q14
If A= [0, 1; -1, 0] and (3 I+4 A)(3 I-4 A)=x^2 I, then the value (s) x is/are:
If $\displaystyle A=\left[\begin{array}{cc}0 & 1 \\ -1 & 0\end{array}\right]$ and $\displaystyle (3 I+4 A)(3 I-4 A)=x^{2} I$, then the value $\displaystyle (s) x$ is/are :
Official answer
(C)
$\displaystyle \pm 5$
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CBSE Class 12 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.