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Mathematics · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 1 · Q4
If Δ_1= |1, 0, 0; 0, 2, 0; 0, 0, 3| and Δ_2= |0, 2, 0; 1, 0, 0; 0, 0, 6|, then
If $\displaystyle \Delta_{1}=\left|\begin{array}{lll}1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 3\end{array}\right|$ and $\displaystyle \Delta_{2}=\left|\begin{array}{lll}0 & 2 & 0 \\ 1 & 0 & 0 \\ 0 & 0 & 6\end{array}\right|$, then
Official answer
(B)
$\displaystyle \Delta_{2}=-2 \Delta_{1}$
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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.