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## Main Question or Discussion Point

I've taken two upper division courses in linear algebra, and yet a trivial problem has arisen that I am having trouble answering! haha

Let A be the matrix:

[1 2 0 3]

[0 0 0 0]

[0 0 1 2]

Is A in RREF? I say yes, however, the majority of students whose papers I am grading say no. If they are correct, what is the reason?

TIA,

Ryan

Let A be the matrix:

[1 2 0 3]

[0 0 0 0]

[0 0 1 2]

Is A in RREF? I say yes, however, the majority of students whose papers I am grading say no. If they are correct, what is the reason?

TIA,

Ryan