Question

how do i tell if a matrix is reduced?

Answer 1

As in reduced to row-echelon form? Are the leading coefficients all 1 and does it follow an upside-down stair pattern?

Answer 2

yes, row echelon form

Answer 3

\[\left[\begin{matrix}1 & a &b \\ 0 & 1 &c \\ 0 & 0 & 1 \end{matrix}\right]\] This is an example of row-echelon form for a 3x3 matrix. You just need to see if it has the 1s in the diagonal and the upside-down stair pattern.

Answer 4

The conclusion you can give out is the solution of the system from r.r.e.f. You can say whether the system has solution or not and how many of them.