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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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    Casio CG50, Casio fx-991EX, Casio fx-85GT PLUS

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.

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