# Math Help - Prove: for any mxn matrix A, Rank(A)=0 iff A is zero Matrix

1. ## Prove: for any mxn matrix A, Rank(A)=0 iff A is zero Matrix

Prove: for any mxn matrix A, Rank(A)=0 iff A is zero Matrix

I know this is easy but I'm just no good at proofs. Can someone help me out?