Math Is Fun Forum

math9maniac

Member

From: Tema

Registered: 2015-03-30

Posts: 443

3 × 3 Matrix

Hi. I'd like to know how to find the inverse of a
3 × 3 Matrix.
Things like finding the adjoint matrix and the determinant of a 3 × 3 Matrix.

Many thanks in advance.

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Only a friend tells you your face is dirty.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 3 × 3 Matrix

Hi;

Try here first:

http://www.mathsisfun.com/algebra/matri … inant.html

http://www.mathsisfun.com/algebra/matri … ugate.html

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

math9maniac

Member

From: Tema

Registered: 2015-03-30

Posts: 443

Re: 3 × 3 Matrix

Thanks bobbym. The information is indeed helpful. Thanks.

How do we actually apply the study of Matrices in practical life. I am only wondering. Thanks.

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Only a friend tells you your face is dirty.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: 3 × 3 Matrix

eg.  http://www.decodedscience.org/practical … tics/40494

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

math9maniac

Member

From: Tema

Registered: 2015-03-30

Posts: 443

Re: 3 × 3 Matrix

Gracías Bob. I found the answer.

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Only a friend tells you your face is dirty.