Which of the following is the right method to find the inver

Which of the following is the right method to find the inverse of a 3 times 3-matrix A? From A + B = 0, find B. Find the transpose of A. From the augmented of matrix [A, I], use Gauss-Jordan Elimination methods to get [I, B]. Then B is the inverse.

Solution

option c

Inverse of a matrix by Gauss-Jordan elimination. Tofind the inverse of matrix A, using Gauss-Jordanelimination, we must find a sequence of elementary row operations that reduces A to the identity and then perform the same operations on I_n to obtain A^-1