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Model Paper 1 — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsModel Paper 11 Mark
MCQ
Let $A=\left|\begin{array}{ll}1 & 1 \\ 0 & 0\end{array}\right|, $ then
  • A
    $A^2=I$
  • B
    $A ^2=4$
  • ✓
    $A ^2= A$
  • D
    $A ^2=0$
✓

Answer

Correct option: C.
$A ^2= A$
 $A^2=\left|\begin{array}{ll}1 & 1 \\ 0 & 0\end{array}\right|\left|\begin{array}{ll}1 & 1 \\ 0 & 0\end{array}\right|=\left|\begin{array}{ll}1 & 1 \\ 0 & 0\end{array}\right|=A$

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