## anonymous one year ago looking for someone who have strong algebra skills to deal with this question ; thanks http://adf.ly/1JGfry

1. Isaiah.Feynman

2. anonymous

yes try this http://img11.hostingpics.net/pics/189241alg.png

3. anonymous

Been a while since I've done linear algebra...for now I'll tag someone @Michele_Laino |dw:1434688448075:dw|

4. anonymous

Haha, as do I, I remember doing similar problems but it was about 2 years ago...

5. anonymous

i think d should be d = (4 ;0 ,:0 )

6. Michele_Laino

it is the solution, nevertheless I think there are many pairs matrices A and column b such that they admit that solution

7. anonymous

R is in reduced row echelon form, ??

8. anonymous

since R is in reduced row echelon form, we must have d = $\left[ d = 4 : 0 ; 0\right]$400 The other two vectors provide special solutions for R, showing that R has rank 1: again, since it is in reduced row echelon form, the bottom two rows must be all 0 so here you have to continu alone because i give you all the key

9. anonymous

oh thank you i realy understand thank you again @Thesn1