True False R2 is a subspace of R3 True False For nonsingular
     True False R^2 is a subspace of R^3. True False For non-singular A, Null(A) = Null(A^-1) True False All subspaces of a given vector space have a non-empty intersection. True False For 3x4 A, Col(A)  R^4 True False If 0 is in S, a finite set of vectors, then S must be linearly dependent. 
  
  Solution
1- True
2- False
3- True
4- True
5- False

