Question

Square matrix $[a_{ij}{]}_{n\times n}$ will be an upper triangular matrix, if

• A. $a_{ij}=0$ , for $i<j$
• B. $a_{ij}=0$ , for $i>j$
• C. $a_{ij}\ne 0$ , for $i>j$
• D. $a_{ij}\ne 0$ , for $i<j$

Answer 1

The correct option is B $a_{ij}=0$ , for $i>j$

A square matrix will be upper triangular matrix if all the elements of the lower triangle are zeros

$a_{ij}=o\forall P>j$