MCQ
$\left|\begin{array}{ccc}1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 14 & 21\end{array}\right|=$
  • A
    1
  • $0$
  • C
    2
  • D
    -1

Answer

Correct option: B.
$0$
B

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