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# Row reduction to row echelon form watch

1. I'm having a lot of trouble with this question; I get everything being = 0 for 1a, which I think is wrong, and for 1b I can't get it into row echelon form. Could someone help me please?
2. (Original post by nigelh456)
I'm having a lot of trouble with this question; I get everything being = 0 for 1a, which I think is wrong, and for 1b I can't get it into row echelon form. Could someone help me please?

I could but I am off to work until 20.30 tonight
hopefully some one else might be around until then
3. (Original post by nigelh456)
I'm having a lot of trouble with this question; I get everything being = 0 for 1a, which I think is wrong, and for 1b I can't get it into row echelon form. Could someone help me please?
1a looks like it has a parametric solution.
4. (Original post by zetamcfc)
1a looks like it has a parametric solution.
I'm pretty bad at maths so I don't even know what that means hahaha could you explain it to me?
5. (Original post by nigelh456)
I'm having a lot of trouble with this question; I get everything being = 0 for 1a, which I think is wrong, and for 1b I can't get it into row echelon form. Could someone help me please?
Show working? Haven't checked but row reducing yields x = 0, y = (3/2)z for me
6. (Original post by nigelh456)
I'm pretty bad at maths so I don't even know what that means hahaha could you explain it to me?
Well first off, explain how you got everything being 0 for 1a.
7. (Original post by zetamcfc)
Well first off, explain how you got everything being 0 for 1a.
okay so I've figured out where I went wrong and redone it. Does this look okay?
Attached Images

8. (Original post by nigelh456)
okay so I've figured out where I went wrong and redone it. Does this look okay?
Looks good, don't have the time to go through b) but it's probably right
9. (Original post by nigelh456)
okay so I've figured out where I went wrong and redone it. Does this look okay?
I thought there couldn't be any non-zero elements above and below the leading 1 for reduced echelon form ?
10. (Original post by A Slice of Pi)
I thought there couldn't be any non-zero elements above and below the leading 1 for reduced echelon form ?
Lol, you're right, I just thought it wanted the answer. Well just a few more manipulations for OP to do, but nothing too drastic (I think).
11. (Original post by zetamcfc)
Lol, you're right, I just thought it wanted the answer. Well just a few more manipulations for OP to do, but nothing too drastic (I think).
This is what I get, but I have yet to check this...
12. (Original post by A Slice of Pi)
This is what I get, but I have yet to check this...
It's just the same, but you go all the way to RREF.

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