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STD 12 - 3 and 4 . determinant and metrices — Mathematics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceMathematicsSTD 12 - 3 and 4 . determinant and metrices1 Mark
MCQ
The order of $[x\,y\,z]\,\,\left[ {\begin{array}{*{20}{c}}a&h&g\\h&b&f\\g&f&c\end{array}} \right]\,\left[ \begin{array}{l}x\\y\\z\end{array} \right]$ is
  • A
    $3 \times 1$
  • ✓
    $1 \times 1$
  • C
    $1 \times 3$
  • D
    $3 \times 3$
✓

Answer

Correct option: B.
$1 \times 1$
b
(b) Order will be $(1 \times 3)(3 \times 3)(3 \times 1) = (1 \times 1)$.

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