Question

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

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

Answer 1

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

$[a_{ij}{]}_{n\times n}$ square matrix is a upper triangular matrix for $a_{ij}=0$, for i>j.