If A is a square matrix of order 3 with \left | A \right |= 4, then write the value of \left | -2A \right |.

 

 

 

 
 
 
 
 

Answers (1)

Since,the order of matrix, n= 3
\left | A \right |= 4
\left | -2A \right |= \left ( -2 \right )^{3}\left | A \right |
\left | -2A \right |= \left ( -2 \right )^{3}\times 4
\left | -2A \right |= -32
\therefore \: The\: value\: of\: \left | -2A \right |\ is -32
 

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