Question

1)a matrix A=[-4 0 2 2] are te matrix row vectors linearly dependent or independent?

1 -1 4 -4

2 5 1 -8

2) is the set of vectors [x y z] in R^3 such as x=z form a subspace ? why or why not?

x=1 form a subspace ? why or why not?

3) give an example of 2x4 matrix whose nullity is four. anf give an exemple of 4x2 matrix whose nullity is also four.