Which of the following are subspaces (mark all that apply)? let A be an m x n matrix and v1, v2, v3 be vectors in R^n a) The set of vectors x in R^n such that Ax =0 b) The set of vectors x in R^n such...

Which of the following are subspaces (mark all that apply)? let A be an m x n matrix and v1, v2, v3 be vectors in R^n

a) The set of vectors x in R^n such that Ax =0

b) The set of vectors x in R^n such that Ax = b

c) The span of the columns of A

d) All the possible combinations of v1, v2, v3

e) [x y z] = t [ 1 -1 1]

f) [x y z] = [3 -1 1] + t [3 2 1] + s[1 0 -1]