Question

which of the following matrices are in row=reduced form?
can anyone help me with matrices?

Answer 1

what are your matixes?

Answer 2

and, how does your course define row reduced form?

Answer 3

1line 1: 1,0|-9
line 2: 0,1 | 2

2. line 1: -,1|-9
line 2: 1,0 | 2

3. line 1: 1,0,-9|2
line 2: 0,1,0 | -3

I am pretty sure only the first one is in reduced form.

Answer 4

there are 2 terms; row reduced; and row reduced echelon

Answer 5

echelon means stairsteps ... its when the bottom left is all zeros

a b c d
0 e f g
0 0 0 h

Answer 6

1 is in row reduced form, but why would you discard the other 2?

Answer 7

2 does not have a leading 1 and a zero after ad the second line should be 0,1

and number three has a -9 in it which should be a 0.

Answer 8

your definition is prolly

has a leading 1 in every row, and that 1 is the only nonzero number in its column

Answer 9

rows 1 and 2 have leading 1s, and they are the only number in their column ... the -9 simply doesnt have a 'row' that it could have a leading 1 to be placed.

Answer 10

does that make any sense?

Answer 11

r1; [1] 0 -9 2
r2; 0 [1] 0 -3


r1 has a leading 1, and its the only number in its column
r2 has a leading 1, and its the only number in its column

there are no more rows to compare in order to discount -9, 2, or 3

Answer 12

sow r1 and r2 are in reduced form?