#### horselurrver

##### New member

- Joined
- Mar 14, 2019

- Messages
- 1

C is a matrix that is the same as A except its second column is (col 2 of A) - (col 1 of A). What is a basis for the nullspace of C?

I have no idea where to begin with this... only that the hint says if M is invertible and y is in Nul(C), then inverse of M * y is in N(CM)