Need to know the inverse for the matrix (plz teach me the method also not the answer)

-5 -2 -2

2 1 0

1 0 1

it is 3x3 matrix

Printable View

- Sep 28th 2008, 04:10 AMsomeone21Inverse Matrix
Need to know the inverse for the matrix (plz teach me the method also not the answer)

-5 -2 -2

2 1 0

1 0 1

it is 3x3 matrix - Sep 28th 2008, 04:17 AMmr fantastic
Read this: tutOR: Matrix Inverse

Why do you need to know? If it's for an assignment or test, you must already have been taught how to do it ....? - Sep 28th 2008, 04:23 AMMoo
Hello,

The method in Mr F's link is obviously the b**est**and maybe the simpl**est**...

Here the indig**est**ible direct formula (Rofl) :

If $\displaystyle A=\begin{pmatrix} a&b&c \\ d&e&f \\ g&h&i \end{pmatrix}$

$\displaystyle A^{-1}=\frac{1}{\text{det} A} \begin{pmatrix} ei-fh&ch-bi&bf-ce \\ fg-di&ai-cg&cd-af \\ dh-eg&bg-ah&ae-bd \end{pmatrix}$ - Sep 29th 2008, 02:06 AMsomeone21
What do you mean indigest and most importantly, is there any quicker way to find the inverse of the matrix or gauss jordan elimination

So any quicker ways to find the solutions for matrix - Sep 29th 2008, 02:19 AMmr fantastic
- Oct 25th 2008, 06:19 AMsomeone21
- Oct 25th 2008, 06:24 AMmr fantastic
- Oct 25th 2008, 06:32 AMMoo
- Oct 25th 2008, 07:31 AMsomeone21
- Oct 25th 2008, 12:08 PMmr fantastic
When you learn about the determinant you will get a method for testing whether the inverse of a given matrix exists. I have already given the general apporach for finding the inverse of a matrix. You can use moo's for a 3x3, if the order is higher you're stuck with with what I've already told you.

It sounds like it might be better if you wait until you've been taught more regarding this subject.