- #1
rey242
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Hi everyone!
Find the inverse of the following using row reduction. If it does not exist, indicate clearly why.
3, 0, 6;
1, -2, x;
1, 2, 1;
2. The attempt at a solution
I started by augmenting with a 3 by 3 Identity matrix:
3, 0, 6, 1, 0, 0;
1, -2, x, 0, 1, 0;
1, 2, 1, 0, 0, 1;
Then I started using Gaussian Elimination until I hit a road bump:
3, 0, 6, 1, 0, 0;
0, -2, x-3, 1/3, 1, 0;
0, 0, x-5, 0, 0, 1;
Should I just keep on pushing though? Or should I try to figure X out? Or is there some sort of theorem out there than can help me?
Homework Statement
Find the inverse of the following using row reduction. If it does not exist, indicate clearly why.
3, 0, 6;
1, -2, x;
1, 2, 1;
2. The attempt at a solution
I started by augmenting with a 3 by 3 Identity matrix:
3, 0, 6, 1, 0, 0;
1, -2, x, 0, 1, 0;
1, 2, 1, 0, 0, 1;
Then I started using Gaussian Elimination until I hit a road bump:
3, 0, 6, 1, 0, 0;
0, -2, x-3, 1/3, 1, 0;
0, 0, x-5, 0, 0, 1;
Should I just keep on pushing though? Or should I try to figure X out? Or is there some sort of theorem out there than can help me?