CBSE 2026 · Region 3 · Set 1 · Q2 · 1 mark
If $\displaystyle \mathrm{A}^{2}=4 \mathrm{~A}+3 \mathrm{I}$ and $\displaystyle \mathrm{A}^{-1}=\mathrm{xA}+\mathrm{yI}$, then the value of $\displaystyle (\mathrm{x}+\mathrm{y})$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle - 1$
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CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.