MCQ
$\left|\begin{array}{cc}a+i b & c+i d \\ -c+i d & a-i b\end{array}\right|=$
  • A
    $a^2+b^2-c^2-d^2$
  • B
    $a^2-b^2-c^2-d^2$
  • $a^2+b^2+c^2+d^2$
  • D
    इनमें से कोई नहीं

Answer

Correct option: C.
$a^2+b^2+c^2+d^2$
C

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