# Homework Help: Gaussian elimination

1. Jul 30, 2012

### charmedbeauty

1. The problem statement, all variables and given/known data

for some reason I am having real trouble trying to solve this system.

2. Relevant equations

3. The attempt at a solution

a=(10,11,4) v1=(2,1,4) v2=(-1,-2,1) v3=(3,3,-1)

the qstn does a belong to the span (v1,v2,v3)?

so I do gauss elim

but I keep running into dead ends can someone please show just the steps to start i.e. R1=R2 +R3

because every time I have tried I can't get the bottom row to have ENOUGH 0'S!!

Thanks.

2. Jul 30, 2012

### who_

Can you please show your work so that we may see how far you have gone and where you have gotten stuck?

3. Jul 30, 2012

### voko

I do not see anything special about this system. Show us what goes wrong for you.

4. Jul 30, 2012

### charmedbeauty

Well as it turns out it was really easy I just kept making mistakes (it was really late at night)
tried it the next morning and I got it fine.
apparently my brain does not work very well when deprived of sleep. Thanks though