# MAT 114 Lecture Notes - Lecture 6: Invertible Matrix, Immunoglobulin G, Gaussian Elimination

## Document Summary

A is that 22 72 matrix a i which when multiplied by a on either side yields the 72 72 idenity matrix i. I lr a was an inverse it is said to be invertible otherwise it is said to be singular. Note if we discovered that nb l then we know that a is the inverse of b and b is the inverse of a. Determine whether or not the given pairs of matrices are inverse pairs. So a t b form on inverse matrices you could say that faith entry example nor. A row i row x column multiplied to to. D to answer entry l matrix for l in. 72 matrix whether am 72 is invertible or not and to find a i exist follow this procedure if it does. 1 write down the x x 2x matrix. 3 if the row reduced from is li l b then a is invertable and b a t.