Let $A=\left[a_{i j}\right]$ be a 2 × 2 matrix such that $a_{i j}=\frac{|-3 i+j|}{2}$ then $a_{21}$ is:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) - $\frac{5}{2}$
$a_{21}=\frac{|-3×2+1|}{2}=\frac{|-6+1|}{2}$
$=\frac{5}{2}$