12th Std Maths Example 1.16(i) Find the rank of matrices which are in row echelon form

12th Std MATHEMATICS
TAMILNADU STATEBOARD SYLLABUS
CHAPTER 1 APPLICATIONS OF MATRICES AND DETERMINANT
Chapter – 1
Ex 1.1
Ex 1.2
Ex 1.3
Ex 1.4
Ex 1.5
Ex 1.6
Ex 1.7

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[jaisonoj]

Sir one small doubt, ROW ECHELON FORM and RANK are same

[monishaanbazhagan]

Hi sir I am first student academic year 2022-2023

[Nithish]

Sir it is already in echeleon form we can directly write it's rank but why these steps because in the previous sums we reduced into echeleon form and directly write the rank and not wrote this step