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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q4
If [4; 1; 3] A = [-4, 8, 4; -1, 2, 1; -3, 6, 3], then order of A must be:
If $\displaystyle \left[\begin{array}{c}4 \\ 1 \\ 3\end{array}\right] \mathrm{A}=\left[\begin{array}{lll}-4 & 8 & 4 \\ -1 & 2 & 1 \\ -3 & 6 & 3\end{array}\right]$, then order of A must be :
Official answer
(B)
$\displaystyle 1 × 3$
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CBSE Class 12 Mathematics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.