- #1
physmatics
- 16
- 0
Homework Statement
So, I want to find the pivot columns to the matrix A:
A=
-1 1 -5 0 2
3 0 6 1 -1
2 -1 7 2 1
2 -7 25 5 1
and after that I want to solve Ax = b where b is (I kind of want to solve Ax = 0 as well, but let's skip that...):
b=
a+3
2a
-a-1
-9a-5
My thought was to solve everything at the same time, and I started doing that by gausselimination. The problem is that I've been stuck for a while with this:
C=
15 0 -15 0 0
0 3 0 0 0
0 0 -6 -1 0
0 0 0 5 10
and
d=
26a+7
a+2
2a
2a+14
The zero at row 2, column 3 is giving me a headache, and I don't know how to solve it at all. Is it possible I made a mistake while doing these row operations?
I'm very thankful for any kind of advice!