- #1

negation

- 818

- 0

## Homework Statement

Let A be the matrix:

[3,3,-2,0;-3,-3,3,-2]

a) An example of a vector in the nullspace of A is

b) An example of a vector NOT in the nullspace of A is

Sorry guy but I'm really STRUGGLING

## The Attempt at a Solution

a) I found x1 ,x2,x3,x4 = -x2+4/3x4, x2, 2x4, x4

=x2( -1,1,0,0) + x4(4/3,0,2,1)

For more than an hour, the answer sheet is telling that my vectors are wrong.

I don't see how it can be wrong.

Ax = 0

I reduced A to row echelon form, then solve in terms of the free variables x2 and x4.