Re: Can 49G do cramer's rule Message #4 Posted by Karl Schneider on 7 Nov 2003, 1:57 a.m., in response to message #2 by Namir Shammas
Namir stated:
Quote:
Cramer's rule is SOOOO inefficient that it is taught for historical purposes and is practical ONLY for solving two (and maybe three) equations.
The 20S has Cramer's Rule built in for solving a system of 3 linear equations (called "3 bY 3")  use "LOAD" to copy it from the calc's ROM into user program memory. However, I'm not sure how the function can be easily used to solve a system of 2 equations, because some determinants would be zero.
