Question: 4
(Choose 1 answer)
(See picture)
A. (iii)only
B. (i) and (ii)\circ nly
C. (ii) and (iii)only
D. (i) only
E. None of the other choices is correct
Which of the following matrices is in reduced row-echelon form?
(i) [\begin{matrix}1&0&0&0&-3\\ 0&0&1&0&4\\ 0&0&0&1&2\end{matrix}]
(ii) [\begin{matrix}0&1&0&0&5\\ 0&0&1&0&-4\\ 0&0&0&-1&3\end{matrix}]
(iii) [\begin{matrix}0&1&0&0\\ 0&0&1&0\\ 0&1&0&-2\end{matrix}]
