How do you find inverses? (the one where you swap x and y and solve for y) I've looked through the manual and it says to press the button 1/x but isn't that only the reciprocal?
How to find "inverses?"

11262007, 12:05 AM
11262007, 12:19 AM
Hi; just want to help, and would like to know:
1  which calculator are you using? The second question of mine is mainly to understand what do you mean by swap x and y and solve for y. Cheers. Luiz (Brazil)
11262007, 12:24 AM
Oh, my bad; I'm using an hp50g. I would like to graph the inverse of x^2 or abs(x). I would also like to find the inverse of sec (x), with x being any real number within the domain of sec.
y=x^2
the inverse would be g(x)= +/ sqrt(x) Edited: 26 Nov 2007, 12:26 a.m.
11262007, 12:26 PM
Make a little program like this. If I am understanding correctly, that is how I did it back in high school. It won't work for some functions though. << 'X' ISOL 'Y=A' SUBST 'X=Y' SUBST 'A=X' SUBST >> TW
11282007, 01:33 AM
Are you telling me that the hp50g doesn't have a builtin button for finding inverses? Unfortunately, I don't know how to program. =/
11282007, 01:37 AM
Fortunately, this is an opportunity for you to start learning ;)
11282007, 10:17 AM
What calculator does?? I agree, you'll have to write the program yourself. And just start with the manual just to get your feet wet; then try to obtain a copy of the HP 48G Advanced User's Reference guide. It should be still available in book form from Calcpro.com for about thirty bucks or so. I believe also it's available on Eric Reichlin's HP48 site in the download section electronically as a .pdf file. This manual is very worthwhile. I was able to use it to get myself to a point at which I can begin to believe I can program almost anything, given reasonable time and maybe a few days more, on a HP48G series or 49G series machine, which does include the HP50g. One caveat: I did learn to program back in high school and college, even if that was back just shortly after stone tablets got obsolete, HP programmable scientific calculators and a "real" computer language. But if as you say you don't know how to program, then I would strongly recommend you start with the 50g manual, then get that AUR I mentioned in this message.
Edited: 28 Nov 2007, 10:20 a.m.
11282007, 11:34 AM
Ed, Walter, Tim:
For reference to this hilarity see threads:
11282007, 12:21 PM
Hi Allen.
Quote: ...so elegant and short that I've just typed and saved it both into the emulator and into the real thing! Thanks to the contributors. Best regards. Giancarlo
11282007, 01:17 PM
I think PhysicsNerd is just trying to wind up well intentioned respondents to his questions. Edited: 28 Nov 2007, 1:18 p.m.
11282007, 03:02 PM
Congratulations, Luiz What a solution!!!! Cheers, Artur 
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