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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 3 · Set 1 · Q1
If A = [1, 4, x; z, 2, y; -3, -1, 3] is a symmetric matrix, then the value of x + y + z is:
If $\displaystyle \mathrm{A}=\left[\begin{array}{ccc}1 & 4 & \mathrm{x} \\ \mathrm{z} & 2 & \mathrm{y} \\ -3 & -1 & 3\end{array}\right]$ is a symmetric matrix, then the value of $\displaystyle \mathrm{x}+\mathrm{y}+\mathrm{z}$ is :
Official answer
(D)
$\displaystyle 0$
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CBSE Class 12 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.