CBSE 2026 · Region 3 · Set 1 · Q5 · 1 mark
If a square matrix A is such that $\displaystyle \mathrm{A}^{2}=\mathrm{A}$ and $\displaystyle (\mathrm{I}-\mathrm{A})^{3}=\mathrm{xA}+\mathrm{I}$, then value of x must be :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle -1$
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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.