CBSE 2026 · Region 4 · Set 2 · Q2 · 1 mark
Let $\displaystyle \mathrm{A}=\left[\mathrm{a}_{\mathrm{ij}}\right]$ be a $\displaystyle 2 \times 2$ matrix whose elements are given by $\displaystyle \mathrm{a}_{\mathrm{ij}}=\frac{(2 \mathrm{i}-\mathrm{j})^{2}}{3}$. Then $\displaystyle \mathrm{A}^{\prime}$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \left[\begin{array}{cc}\frac{1}{3} & 3 \\ 0 & \frac{4}{3}\end{array}\right]$
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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.