Target Exam

CUET

Subject

Section B1

Chapter

Matrices

Question:

If $A = [a_{ij}]$ is a skew-symmetric matrix of order $n$, then

Options:

$a_{ij} = \frac{1}{a_{ji}} \forall i, j$

$a_{ij} \neq 0 \forall i, j$

$a_{ij} = 0, \text{ where } i = j$

$a_{ij} \neq 0 \text{ where } i = j$

Correct Answer:

$a_{ij} = 0, \text{ where } i = j$

Explanation:

The correct answer is Option (3) → $a_{ij} = 0, \text{ where } i = j$ ##

In a skew-symmetric matrix, the $(i, j)^{th}$ element is negative of the $(j, i)^{th}$ element and all the diagonal elements are 0 i.e., $a_{ii} = 0$  Hence, the $(i, i)^{th}$ element = 0.