Please forgive my amnesia. Entering “f(x)” on Casio fx991EX

08262023, 08:38 AM
Post: #1




Please forgive my amnesia. Entering “f(x)” on Casio fx991EX
Hi all.
My memory must be going. How can I define f(x) and g(x) and then evaluate expressions like 3f(15)^2+9f(2.5)? I know that TABLE lets you define f(x) and g(x). It doesn’t seem I can call up the f( and g( operations outside of TABLE mode or am I missing a step or a few? Your help is greatly appreciated. Thank you. 

08262023, 02:04 PM
Post: #2




RE: Please forgive my amnesia. Entering “f(x)” on Casio fx991EX
the 1st option:
store your variables type your function to calculator with stored variables evaluate your function change and store your variables use replay command (the up arrow) and evaluate your function again the 2nd option: use spreadsheet 

08262023, 11:11 PM
(This post was last modified: 08262023 11:52 PM by Matt Agajanian.)
Post: #3




RE: Please forgive my amnesia. Entering “f(x)” on Casio fx991EX
(08262023 02:04 PM)klesl Wrote: the 1st option: Okay. From what you’re saying:l Example: f(g(x)) 1Store variables. 2Enter g(x). 3Evaluate. 4Store result in x. 5Enter f(x) 6Evaluate Now that f(x) and g(x) are in the history stack, AStore new value BR↑ history stack to g(x) and evaluate. Cstore result in x. DR↑ history stack to f(x) and evaluate. Repeat Steps AD R↑?? I couldn't resist. 

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