試題詳解

1. Let
be the reduced row echelon form of a matrix A = . Which of the
following statements is/are true?
(A) is the 4 x 1 zero vector.
(B) The three column vectors , are linearly independent.
(C) The column space of R is the same as the column space of A.
(D) Let B = be a submatrix of A. The reduced row echelon form of B is
not always a submatrix of R.

(E) None of the above is true.
R=