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How can I get the Casio fx-991EX 'CALC' button on the Casio CG

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#1 GenericUsername



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Posted 03 January 2019 - 10:06 AM

Not sure if this is the right place for this...


On the Casio fx-991EX, I could type in a function, such as '2x+3', and after pressing the 'CALC' button, I could type in a value of x, and it would put it into the equation and give me the result. Does anyone know how to do this on a Casio CG50? I know I can just set a variable, and use that in the function, but the 991EX made it so much easier for doing this for multiple values.

#2 pan.gejt


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Posted 03 January 2019 - 09:09 PM

You have 3 options how to achieve this


1. Use graph variables when you are in Run-Matrix menu, type the function with the quotes


e.g. "2x+3"->Y1

and recall this variable with "x value" in the parenthesis like in the textbooks

Y1(2), Y1(-5)


This syntax stores 2x+3 to variable Y1, the variable Y is available through vars key - F4 (Graph) - F1(Y) and press the desired position (1 - 20).


2. Use function memory (available for linear input/output only)


see the UG page 2.9 - 2.10


3. Write your own program


"F(x)"->Y1: "x value"?->x:Y1(x)


After run the program type the function, press enter, input x value and press enter to see the result. 

You can store the function to position 1 - 20 like in the 1st option. 

Edited by pan.gejt, 03 January 2019 - 09:10 PM.

#3 jlipskoch



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Posted 05 June 2020 - 02:07 AM

I think the best way is to use the Equation solver (Menu --> A --> F3).  All you have to do is enter your expression and add an equals with another variable representing the result.  Then you can change the variables and solve for the result variable repeatedly.  I like the calc button better but this is a pretty good work around.  

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