My HP prime is inverting matrices incorrectly. (I know because I am comparing the results against MATLAB and textbook examples.
For example, inverting the following matrix,
0 1.9972e-6] ****This is an icorrect answer
The correct answer is
Why is the calculator zeroing out those two values of the matrix instead of returning the correct values? I have tried manipulating the settings several different ways and still get the incorrect results.
I am performing these calculations in home screen in RPN mode. The calculator seems to be able to invert this matrix correctly in CAS mode, but this is useless to me because I need to perform calculations in the stack. CAS gives me improper fractions so I can't do anything with them.
I recently took an exam that required matrix inversion and I failed it because my calculator kept giving me bogux answers.
Until somebody gives a better reply, here's a workaround that might help you. If you store your matrix in M1, then type 1./M1in CAS (be sure to include that decimal point!), you'll get the result you're looking for. OR you can turn off the "Exact" setting in the CAS Settings screen.
Disclaimer: I don't work for HP. I'm just another HP calculator fanatic.