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3 and 4 . determinant and metrices — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMaths3 and 4 . determinant and metrices1 Mark
MCQ
If $A = \left[ {\begin{array}{*{20}{c}}0&1&{ - 2}\\{ - 1}&0&5\\2&{ - 5}&0\end{array}} \right]$, then
  • A
    $A' = A$
  • ✓
    $A' = - A$
  • C
    $A' = 2A$
  • D
    None of these
✓

Answer

Correct option: B.
$A' = - A$
b
(b) $A' = \left[ {\begin{array}{*{20}{c}}0&{ - 1}&2\\1&0&{ - 5}\\{ - 2}&5&0\end{array}} \right] = - A$.

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