- #1
salman213
- 302
- 1
Hi, I have a midterm tomorrow for my Lin Alg course and I was doing some review probs and I can't seem to understand this one..
http://img119.imageshack.us/img119/239/39786409wb4.jpg
Can someone help me and explain how to do this one!
I know I can just find the whole vector
x1,x2,x3,x4 by just multiplying by A^-1 but on a midterm I don't thinK I will want to waste time and find the inverse of such a matrix if there is another way to approach this problem.
http://img119.imageshack.us/img119/239/39786409wb4.jpg
Can someone help me and explain how to do this one!
I know I can just find the whole vector
x1,x2,x3,x4 by just multiplying by A^-1 but on a midterm I don't thinK I will want to waste time and find the inverse of such a matrix if there is another way to approach this problem.
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