Math 345: Differential Equations
Course Description Notes and Files
Homework Assignments Chapter Notes

How to use Ti-83/89-calculators to compute RREF  (by Harrison Filas)

Ti-83   => define the matrix [A]

    => Type rref ([A])

Ti-89   => Type rref ([[R,C,R,C2, ..., R1,Cx][R2C,R2C2, ..., R2Cx]])

example:

rref([[1,-5,2,3][7,6,-4,0][11,-2,5,17]])

     

 

Note: On the Ti-89 you can type out rref( instead of selecting it from the catalog, with the Ti-83 it must be selected. On the Ti-83 rref( can also be found in the matrix menue under the MATH sub-menue.
On the Ti-89 you can also get rref( by pressing 2nd - 5 - 4 - 4.