Question Number 80037 by Aashishyadavgangaria last updated on 30/Jan/20
![A matrix A= [(a_(ij) ) ] is an upper triangular matrix if](https://www.tinkutara.com/question/Q80037.png)
$$\mathrm{A}\:\mathrm{matrix}\:{A}=\begin{bmatrix}{{a}_{{ij}} }\end{bmatrix}\:\mathrm{is}\:\mathrm{an}\:\mathrm{upper}\:\mathrm{triangular} \\ $$$$\mathrm{matrix}\:\mathrm{if} \\ $$