SOLUTION: What is an invertible matrix and how do you show that it is invertible?

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Question 1044869: What is an invertible matrix and how do you show that it is invertible?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
A square matrix is invertible if there exists a matrix such that where I is the identity matrix.

A matrix is invertible if and only if its determinant is not zero.