CBSE 2024 · Region 4 · Set 1 · Q3 · 1 mark
If $\displaystyle \mathrm{A}=\left[\begin{array}{cc}2 & 1 \\ -4 & -2\end{array}\right]$, then the value of $\displaystyle \mathrm{I}-\mathrm{A}+\mathrm{A}^{2}-\mathrm{A}^{3}+\ldots$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \left[\begin{array}{cc}-1 & -1 \\ 4 & 3\end{array}\right]$
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CBSE Class 12 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.