# Thread: Struggling with 3 matrix/vector calculus questions II

1. ## Struggling with 3 matrix/vector calculus questions II

Hello,

I have a practice exam paper and I have 3 questions which i have no idea how to do or what the answers are. I somebody could explain them that would be great, I'm desperate!

Q3. Let B = [2 0 1 3/3 1 2 7/5 1 3 13]
a) use caussian algorithm to bring B to echelon form U.
b) Find a basis for the null space of B.
c) Find a basis for the column space of B.
d) Find a basis for the row space of B.

I know its a lot but i have had a few equations i was stuck and am slowly working my way through but i don't know where to begin on these ones. Apparently these will be the hardest ones on the exam and worth the most.

Any help will be vastly appreciated! Thank you
Tania

2. Originally Posted by Taniam16
Hello,

I have a practice exam paper and I have 3 questions which i have no idea how to do or what the answers are. I somebody could explain them that would be great, I'm desperate!

Q3. Let B = [2 0 1 3/3 1 2 7/5 1 3 13]
a) use caussian algorithm to bring B to echelon form U.
b) Find a basis for the null space of B.
c) Find a basis for the column space of B.
d) Find a basis for the row space of B.

I know its a lot but i have had a few equations i was stuck and am slowly working my way through but i don't know where to begin on these ones. Apparently these will be the hardest ones on the exam and worth the most.

Any help will be vastly appreciated! Thank you
Tania
And you have been able to do what with them? Show us what you've got.

-Dan