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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 3 · Set 1 · Q2
If A ·( adj A)= [3, 0, 0; 0, 3, 0; 0, 0, 3], then the value of |A|+| adj A| is equal to:
If $\displaystyle A \cdot(\operatorname{adj} A)=\left[\begin{array}{lll}3 & 0 & 0 \\ 0 & 3 & 0 \\ 0 & 0 & 3\end{array}\right]$, then the value of $\displaystyle |A|+|\operatorname{adj} A|$ is equal to :
Official answer
(A)
$\displaystyle 12$
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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.