Skowhegan Area High School
Contemporary Mathematics In Context                                                                                      skowbutton msadbutton
Topics
Using Matrices
Adding and Subtracting Matrices
Multiplying Matrices
Matrices to a Power
[A]^-1 [B] Inverses of Matrices
Matrices and Systems of Linear Equations

 

Every real number (except zero)
has a multiplicative invserse.
The product of a non-zero number and
its multiplicative inverse must be equal to one.

 

Example:
Multiplicative Inverses
3&1/3
2&1/2
5/3&3/5


 

Our goal in understanding multiplicative inverses is that, while you can
add, subtract, and multiply matrices, you CANNOT divide.
Instead we use inverses.