Question

reduce the following matrix to echelon form:
3 4 -1 1
1 -1 3 2
4 -3 112

Answer 1

{{3, 4, -1, 1},
{1, -1, 3, 2},
{4, -3, 11, 2}}

= {{1, 0, 0, 62/3}, {0, 1, 0, -(55/3)}, {0, 0, 1, -(37/3)}}

using mathematica

Answer 2

Hi experimentX, what about starting by interchanging row 2 with row 1 ?

Answer 3

well, you can do that too .. or start R1->R1/3

Answer 4

that's a pretty long calculations!! try doing in paper first

Answer 5

ok
how did you start with your first solution?

Answer 6

R1->R!/3?