CBSE 2026 · Region 1 · Set 3 · Q6 · 1 mark
If $\displaystyle \mathrm{A}=\left[\mathrm{a}_{\mathrm{ij}}\right]_{3 \times 3}$ is a scalar matrix then which of the following must be true ?
Official answer
From CBSE’s own marking scheme for this paper.
(A)
A must be a symmetric matrix.
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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.