Precalculus 2014
 |
|---|
27
| PAGE: 393 | SET: Exercises | PROBLEM: 27 |
Please look in your text book for this problem Statement
The system of equations are
Write the equations into matrix form 
.
Where 
is coefficient matrix, 
is variable matrix and 
is constant matrix.
Definition of inverse matrix :
If is an 
then 
, where 
.
Let 
, then 
.
, then has an inverse.
Cofactor of is
Cofactor of 
.
Find 
.
.
The inverse of the is
Multiply by 
to solve the system.
is
.
, 
and 
.
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