Question

In a square matrix of order 3×3, which of the following can be a leading diagonal element?

• A. $a_{13}$
• B. $a_{22}$
• C. $a_{23}$
• D. $a_{12}$

Answer 1

The correct option is B $a_{22}$

In a square matrix, the elements of the form
$a_{11},a_{22},a_{33},...(i.e)a_{ii}$
are called leading diagonal elements.

For example in the matrix
$\left[\begin{array}{ccc}1& 3& 5\\ 6& 7& 8\\ 9& 25& 2\end{array}\right]$
1, 7 and 2 are the leading diagonal elements.