Linear Algebra Conditions

[foxsboris.naumov1994]

The answers is b) ab≠1, but I have no clue how to get to that answer... Can someone help me?

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[Monkey.King]

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[Turkishking]

Picture does not show, and SDN is not for homework help.

 

[Monkey.King]

Picture does not show, and SDN is not for homework help.

Read the homework policy. What he asked is acceptable.

 

[AlteredScale]

The homework policy specifically says not to create "Is it A, B, C, or D" style threads that are specifically created to get an answer for a specific homework problem, specifically.

The answers is b) ab≠1, but I have no clue how to get to that answer... Can someone help me?

Closing.