Let m and N be two 3x3 matrices such that MN=NM. Further if `M!=N^2` a – InterviewSolution

1.	Let m and N be two 3x3 matrices such that MN=NM. Further if `M!=N^2` and `M^2=N^4` then which of the following are correct.
Answer» `M!=N^2` `M^2=N^4` `M^2-N^4=0` `M^2-(N^2)^2=0` `(M-N^2)(M+N^2)=0` `M-N^2!=0` `M+N^2=0` `\|M+N^2\|=0` `\|M^2+MN^2\|=0` `\|A\|=0` `\|A\|U=0` It is possible for infinite matrices. Here,(M+MN^2)U=zero matrix. Option A and B is correct.

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