Recent content by Carnap

I figured it out. I went ahead and reread the material for a third and worked out exactly what they had for an example and I saw exactly were I was going wrong. I think I was trying to combine row interactions with factoring of columns. I am reading now how I can do it with any row or any...

I tried that on the row with mostly 0's to simplify the problem but my answer came up wrong. Could you post step by step how to do it. You don't need to do the actual calculation, just the steps. I want to understand the concept, not necessarily the answer. Perhaps with the original matrix.

Do I base the 3x3 matrices based on using the top of each column for the multiplier?

Never mind. I factored it out completed and with subtraction of equations I came up with a line of all 0's so there is no determinant. I entered it wrong above. That can't be right. What I have left is this. 1 0 -1 -3 0 1 0 0 0 0 0 1 0 0 0 0 Am I reading this right?

Using row exchanges and factoring I came up with the following matrix. 1 2 -1 -1 1 3 1 2 0 0 0 1 -1 2 1 24 The example you gave me showed doing the pivot on a 3x3. Where do I pivot on the 4x4? I was thinking that we do the 3x3 matrix evaluation 4 times but where do I begin.

I have some confusion between column and row evaluations. I am not sure which one to use (row seems to make sense since there are several 0's).

I tried to apply the 3x3 matrix times the value of 1. I use the diagonal method. I am not sure what it is actually called.

Homework Statement The matrix is in the following form 2 4 -2 -2 1 3 1 2 1 3 1 3 -1 2 1 2 Homework Equations The Attempt at a Solution I subtracted equation 2 from equation 3 and came up with the following matrix 2 4 -2 -1 1 3 1 2 0 0 0 1 1 -2 1 2 It seems to make...