Browse Questions

# If A is a matrix of order $3\times 3$,then | 3A |=_______________.

Toolbox:
• $k|A|=k^3|A|$
We know from the information in the tool box,$k|A|=k^3|A|$
If a matrix of order $3\times 3$,then $|3A|=3^3|A|=27|A|$