[phpBB Debug] PHP Notice: in file /viewtopic.php on line 988: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone.
[phpBB Debug] PHP Notice: in file /viewtopic.php on line 988: getdate(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone.
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 4509: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 4511: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 4512: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 4513: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
how can I prove the matrix `[[0, 2], [1 ,-4],[2 ,4]]`

how can I prove the matrix `[[0, 2], [1 ,-4],[2 ,4]]`

All Linear Algebra and matrix questions here.

Moderator: ChangBroot

Forum rules
To type int use \`int\` and the same way to type sqrt simply type \`sqrt\` or Please view the examples forum.

As you type, live preview is displayed so you know exactly what are you typing.

how can I prove the matrix `[[0, 2], [1 ,-4],[2 ,4]]`

Postby barnamah » Mon 04 April, 2011 20:37

How can I prove that matrix `w=[[0, 2], [1 ,-4],[2 ,4]]` has no inverse
Explore and know. That is asked.
User avatar
barnamah
 
Posts: 102
Joined: Mon 14 March, 2011 08:37
Location: Canada

Re: how can I prove the matrix `w=[[0, 2], [1 ,-4],[2 ,4]]`

Postby Integr88 » Mon 04 April, 2011 20:47

to find the inverse of a matrix, it must be square.
the reason it must be square is that in order to get the inverse `w=[[0, 2], [1 ,-4],[2 ,4]]` we have get the determinant of w which is `|w|` and in order to get the determinant of a matrix for example
`A=[[a , b],[c,d]]`
`|A|=a*b-c*d`
we can't do this to w because w is not square.
User avatar
Integr88
 
Posts: 71
Joined: Tue 15 March, 2011 13:27


Return to Linear Algebra

Who is online

Users browsing this forum: No registered users and 1 guest

cron