Rank of a matrix

[@sivalenkachandrasekhar1750]

Is it necessary to do last transformation as already traingle formed in step 1 itself and then rank will be 3 ,this system is not that much helpful .only det method is good enough to solve

[@justfilmi397]

You explained very well sir

[@shankarsharma0909]

Why column interchange ?

[@MashoBiftu]

❤❤❤❤❤

[@sampathvinay2920]

In the first row operations you have obtain below diagnol zero then why you perform column operation?

[@shankarsharma0909]

Yea why ? I don't get it either.

[@TherealSanglun]

So basically we can finish this matrix in two steps right?