If A is a $3 \times 3$ square matrix such that $|A|=2$, then $|3 adj ~A|$ is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 108
$|3 adj\,A|=3^3×|A|^{3-2}$
$=27×|A|^2=27×4$
$=108$
If A is a $3 \times 3$ square matrix such that $|A|=2$, then $|3 adj ~A|$ is
Correct answer: option 1
The correct answer is Option (1) → 108
$|3 adj\,A|=3^3×|A|^{3-2}$
$=27×|A|^2=27×4$
$=108$