- #1
daemon_dkm
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Homework Statement
Consider the following linear system of equations:
x1+2x3-5x4 = 0
x1 + 4x2 +4x3 – 5x4 = 10
x1 + 2x2 + 3x3 – 5x4 = 5
4x1 + 2x2 + 9x3 – 20x4 = 5
b) Solve the equation system with the Gaussian method.
c) The solution set describes a plane. Specify it in the parameter form.
Homework Equations
Parameter form: [itex]\vec{r}[/itex]= [itex]\vec{r}[/itex]0 + λ[itex]\vec{v}[/itex] + β[itex]\vec{w}[/itex]
The Attempt at a Solution
3. My Work
After Gauss?:
1 2 0 -5 0
0 2 4 0 10
0 0 3 0 5
0 0 0 0 0
Rank is 3 so there is one free chooseable variable. I chose x4 and ended with the equation:
[itex]\vec{X}[/itex] =
[tex]\begin{vmatrix}-10/3\\5/3\\5/3\\0\end{vmatrix}[/tex] + [itex]\vec{x}[/itex]4 * [tex]\begin{vmatrix}5\\0\\0\\1\end{vmatrix}[/tex]
Which I think is the plane’s formula? I’m not totally sure. My teacher said that he wouldn’t be putting the answers up, so I wanted a second opinion on my numbers. Please and thank you.
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