CBSE 2024 · Region 3 · Set 1 · Q1 · 1 mark
If $\displaystyle \mathrm{A}=\left[\mathrm{a}_{\mathrm{ij}}\right]$ is an identity matrix, then which of the following is true ?
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \mathrm{a}_{\mathrm{ij}}= \begin{cases}0, & \text { if } \quad \mathrm{i} \neq \mathrm{j} \\ 1, & \text { if } \quad \mathrm{i}=\mathrm{j}\end{cases}$
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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.