- #1

ivanyo

- 5

- 0

Hi everyone!

I'm in need for some help with Matrix Reduction! I have two questions:

Find the inverse of Matrix A by reducing the array (A|I), where

A=

2 4 6

4 5 5

3 1 -3

Find all solutions of the following system:

2x

x

-2x

x

The last two images are my attempt at question two. I get stuck trying to find x

*My apologies for the bad handwriting! Imgur is playing up and won't let me rotate the last 3 photos either :(

Image 1 - http://imgur.com/hXHhh

Image 2 - http://tinypic.com/view.php?pic=29kpg5l&s=7

Image 3 - http://tinypic.com/view.php?pic=9zrkex&s=7

Image 4 - http://tinypic.com/view.php?pic=33cxfuh&s=7Thanks for any help in advanced!

I'm in need for some help with Matrix Reduction! I have two questions:

**Question 1**Find the inverse of Matrix A by reducing the array (A|I), where

A=

2 4 6

4 5 5

3 1 -3

**Question 2**Find all solutions of the following system:

2x

_{1}+ 4x_{2}+ x_{3}- 3x_{4}- 3x_{5}= -5x

_{1}+ 2x_{2}- x_{3}+ 3x_{4}- 3x_{5}= -4-2x

_{3}+ 7x_{4}- x_{5}= 0x

_{1}+ 2x_{2}+ x_{4}- x_{5}= -1The first two images are my attempt at question 1 - I get stuck and can't seem to get the identity matrix on the left. I know the answer (in red) through using a Matrix Calculator.The last two images are my attempt at question two. I get stuck trying to find x

_{2}and x_{1}using back substitution. Any suggestions?*My apologies for the bad handwriting! Imgur is playing up and won't let me rotate the last 3 photos either :(

Image 1 - http://imgur.com/hXHhh

Image 2 - http://tinypic.com/view.php?pic=29kpg5l&s=7

Image 3 - http://tinypic.com/view.php?pic=9zrkex&s=7

Image 4 - http://tinypic.com/view.php?pic=33cxfuh&s=7Thanks for any help in advanced!

Last edited: