Math Forums @ Math Goodies - Matrix invertible

testing header

Math Goodies is a free math help portal for students, teachers, and parents.

| More

Interactive Math Goodies Software

Math Forums @ Math Goodies

Username:	Password:
Save Password
Forgot your Password?

All Forums

Homework Help Forums

Algebra

Matrix invertible

New Topic

Reply to Topic

Printer Friendly

Author

Topic

Manu
Average Member

Australia
9 Posts

Posted - 04/10/2012 : 10:40:24

Show that matrix A
1 2 1 0
3 1 2 3
2 5 0 1
2 -1 1 3
is not invertible

I took a
24

so (1 2 1)
3 (2 5 0)
(2 -1 1)
which gave me det A = -33
so not invertible.
Am I right. Any help would be good.

the_hill1962
Advanced Member

USA
1440 Posts

Posted - 04/10/2012 : 11:50:02

You are correct, the matrix does not have an inverse.
However, I don't understand what you meant about "I took a 24".

Topic

New Topic

Reply to Topic

Printer Friendly

Jump To:

Math Forums @ Math Goodies

This page was generated in 0.05 seconds.

Snitz Forums 2000

testing footer