Question 13: If is a matrix and is a matrix, then choose the set of c…

Select all that apply.

1. A

   If is the augmented matrix and is the matrix obtained from after a finite number of elementary row operations, then the system and the system have the same set of solutions.

2. B

   If is the reduced row echelon form of , then the system has at least one solution.

3. C

   If is the reduced row echelon form of , then is also in reduced row echelon form.

4. D

   If is the reduced row echelon form of and there is no row such that the only non zero entry lies in the last column of , then the system has at least one solution.