SOLUTION: Which 1x1 matrix is invertible

SOLUTION: Which 1x1 matrix is invertible

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Question 1066142: Which 1x1 matrix is invertible
Answer by ikleyn(52803) (Show Source): You can put this solution on YOUR website!
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You can consider 1x1-matrix simply as the number (real number).

So, do you know which real number is invertible ?

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