Hello everyone!! I'm alittle confused, my professor found the Null space after some students didn't get how to do it, such as myself. Here is the image and problem:(adsbygoogle = window.adsbygoogle || []).push({});

http://img497.imageshack.us/img497/4161/lastscan9es.jpg [Broken]

Thats the row reduced forum of the orginal matrix. The orginal matrix was:

-1 4 1

7 -9 0

10 3 -3

-9 1 2

he added a column of 0's so it wuold make it a square matrix, then he row reduced to get the matrix in the link.

I understand where the Null space of A is:

9/37

7/37

1

0

that makes sense to me, but then he adds in:

d =

0

0

0

1

why is that also a set of vectors in the Null space? d is just all 0's, how can he have a 1 also?

Then i'm lost on what i'm suppose to do to find the image space, you can see my work in the image above. What do i do after i set them equal to r,s,t,u? Thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Question on Null and Image Space! matrices! wee!

**Physics Forums | Science Articles, Homework Help, Discussion**