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3. let a and b be n by n matrices show...

# Question: let a and b be n by n matrices show...

###### Question details

Let A and B be n by n matrices. Show that if AB is invertible, so is B. I have to use Theorem 8 part (d) to show my answer. Theorem 8 part d is "The equation Ax=0 has only the trivial solution". How would I prove this using this theorem?