How do you find the inverse of #A=##((4, -2, 1), (3, 1, 2), (1, 2, 2))#?
You can see it in the picture!
I guess you can follow.
I prefer to append an identity matrix to the right, then use elementary row operations to reduce the original matrix to an identity matrix; when this done, the matrix on the is the inverse.
Append an identity matrix:
Perform elementary row operations until the matrix on the left is an identity matrix.
The inverse matrix is on the right:
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