試題詳解

12. (10%) Let M be a subset of R' containing two or more vectors. Then:
(A) The span of any two vectors in M is a plane in R3
(B) Every vector in M is in the span of M
(C) If M contains more than three vectors, then M is linearly independent
(D) The span of any two nonzero vectors in M is a plane in R3
(E) None of the preceding statements is true