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"Argument Error" of the Casio 35+

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MmimiN Posted messages 3 Status Member -  
 lili -
Hello,

Actually, we're entering a new chapter in math specialization "Continuity and Differentiability," so we need to use the graph. So I go into MENU and then GRAPH. I enter my function and click on F6 (draw) but it shows "Argument Error Press: [EXIT]."
I don't know what happened; I don't remember touching anything.
The same thing happens when I go into MENU and then TABLE, following the same procedure.
Please help me ????????
I tried to find the problem by comparing with my friends' devices, but even then, nothing is resolved.
I've seen several questions of this kind, but I didn't understand.

2 answers

  1.
    Pierr10 Posted messages 13828 Registration date   Status Moderator Last intervention   5 840
     
    Hello,

    You probably used the alpha key to enter the variable x.
    Use the key 
    x,θ,T
    .

    --
    What is well conceived is clearly stated,
    And the words to express it come easily.
    (Boileau)
    34
    1. MmimiN Posted messages 3 Status Member 2
       
      Hello,
      I want to clarify that this was not the case, I was using the F5 key for X. So now I just tried to use ALPHA then X, etc. and it works, I'm not complaining but is that normal?

      In any case, thank you very much, you saved me, I really thought it wouldn't work out.
      2
      1. Pierr10 Posted messages 13828 Registration date   Status Moderator Last intervention   5 840 > MmimiN Posted messages 3 Status Member
         
        Good evening,

        I don't have a Casio calculator and I'm not very familiar with them. So I'm responding a bit blindly and based on common sense.

        I'm a bit surprised that alpha + x works. (Casio must have included a tolerance).

        I recommend getting into the habit of using the 
        x,θ,T
        key for variables.
        The letter obtained changes depending on the type of graph created:
        x in Cartesian coordinates,
        θ in polar coordinates
        t for parametric curves.

        Also, take a look at this document: http://briand-lyc.spip.ac-rouen.fr/IMG/pdf/200_graph35_.pdf
        4