Let $A=\left[a_{i j}\right]$ be a 2

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Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Matrices

Question:

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:

Options:

$-\frac{1}{2}$

$\frac{5}{2}$

$-\frac{5}{2}$

$\frac{1}{2}$

Correct Answer:

$\frac{5}{2}$

Explanation:

The correct answer is Option (2) - $\frac{5}{2}$

$a_{21}=\frac{|-3×2+1|}{2}=\frac{|-6+1|}{2}$

$=\frac{5}{2}$