Question about Casio CFX-9850G Plus Calculator

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The calculator wont recognise the blue funtion buttons (1-6)


My calculator works although it won't let me use the F1-F6 blue buttons. I'm not sure why it is doing this but I can no longer zoom, delete data and sketch.

Is it possible that there is a function to lock the function buttons from use? or Is my calculator broken?

The model is a CASIO CFX-9850GC PLUS

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  • 4 Answers

Clear the ram:
1. Press [MENU]2. Press [tan] (MEM)3. Select RESET4. [F1] (yes)

Posted on May 18, 2009

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How do you turn frequency on when in the stats table mode on a casio fx-9750gii?

There is no such thing as turning the frequency on on the Casio calculators. Just enter your data in lists. Choose one List where you put the frequency information. When you want to GRAPH or perform CALCulations you have a TAB labeled SET corresponding to key F6:SET. When you press F6, a new screen open where you assign the list to the variables.
Here are a few screen captures to help you.


Press F2:CALC (or F1 Graph). The Tab SET appears at the bottom of screen


Press F6:SET
Higlight the line 1-Var Freq (or 2-Var Freq). The bottom of screen shows F1:1 and F2:LIST. If frequencies are not equal to 1, press F2:LIST to assign the frequency list. I entered 2.


List2 is now the frequency list.

Press EXE to perform stats.


See that n=19.

May 19, 2011 | Casio FX9750GII Graphic Calculator

1 Answer

The buttons of my casio cfx-9850GC plus ( buttons f1,f2,f3,f4,f5,f6) dont work. What can I do to solve my problem???

First of all check its warranty, if exists, concern the authorized dealer or representative. If not unscrew your calculator and clean keypad with a wet white cotton cloth by rubbing gently you will see black spots on the cloth. place the keypad at where it was placed previously. You will find it working as usual. INSHALLAH.

Oct 08, 2010 | Casio FX-9750GPlus Calculator

1 Answer

Where is the factorial (!) button on the casio fx-9750?

There is no button but a menu tab.
In Run screen, enter the number whose factorial you want to calculate ( number can be at most equal to 69), press [OPTN][F6] to get to next page pf menus. Press then [F3](PROB) then [F1] (x!) followed by [EXE].

Sep 20, 2010 | Casio FX-9750GPlus Calculator

1 Answer

How can I calculate a large factorial using casio algebra fx 2.0, without manually inputing all values?

There is a function to calculate them for you.

In CAS, or Algebra or Tutor Modes, use the x! option
In Run-Math, press [OPTN][F6] to pan right, then [F1] to access the (PROB) menu then enter option number corresponding to x!
The way it works is as follows
number ! [EXE].
Due to memory limitations, you can calculate factorials of numbers up to 69.

Hope it helps.

Nov 12, 2009 | Casio Algebra FX 2.0 Calculator

3 Answers

Argument error whenever I type equations with variables.

Perhaps you have some data stored in the x variable.

With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

If you find x in the list, highlight x, then press F1, and then select delete.

Now it should work like normal.

Oct 22, 2009 | Texas Instruments TI-89 Calculator

1 Answer

How do I do absolute functions on a CASIO CFX 9805g calculator

Turn calculator [ON]. Use arrows to select [RUN] icon. Click [ENTER].
In RUN screen press [OPTN][F6:->][F4:NUM][F1:ABS] [ENTER].
The command echoes on the RUN screen as Abs . Enter the number or the expression and press {ENTER]. You should enclose the argument of the absolute function in parentheses. If the first number entered is negative, use the change sign (-).
Hope it helps.

Oct 13, 2009 | Casio Office Equipment & Supplies

1 Answer

I need to know how to get to reduced row echelon form

The matrix cell operations (row calculations, column operation) are accessed as follows:

Press [Menu] button. Highlight [MATRIX] icon and press [EXE]. The list of matrices is diplayed. If you already created the matrix, it will be listed and you can select it (using the arrows) and press [EXE].
Three menu items are displayed:
F1:R.OP (Swap, XRw,XRw->,Rw->
F2:ROW (Del, Ins, Add)
F3: COL (Del, Ins, ADD)

Matrix Operations are accessed in RUN screen by pressing [OPTN] and selecting [F2:MAT] . Availabble options ( they are commands) are
F1: Mat displays identifier Mat on screen
F2: M->L converts a matrix to a list
F3: Det Calclates the determinant
F4: Trn Calculates the transpose of a matrix
F5: Aug Augments a matrix
F6 -> accesses additional operations
F1:Iden Create an identity matrix with specified dimensions
F3: Fill

In addition to the foregoing you have the matrix operations (+, -, x, square, inverse).
However there is an additional piece of software that performs the row echelon reduction on the CFX9850GBPlus. The information is available here (page 13: program ROWREDA)

The program can be downloaded from this site.

Hope it helps.

Aug 15, 2009 | Casio FX-9750GPlus Calculator

1 Answer

The calculator that I have is all blue or black in the screen

The right way to set contrast is
1.Press [Diamond] key, release it
2. Press [+] and release it (to increase contast) or [-] to decrease.
3 repeat steps 1, 2 till contrast is adequate.

If you follow procedure and it does not work resel machine to factory default [2nd][MEM] [F1][1][2]

Hope it helps

Jun 30, 2009 | Texas Instruments TI-89 Calculator

1 Answer

How to draw f(x,y) =x^2+y^2-2x

Press [MENU]. Highlight the [GRAPH] icon and press [EXE]. Press [F3:Type] then [F2: r=]. Enter you expression as 1+ cos(theta). If there are any functions Y=, delete them by highlighting each one and pressing [F2:Del][F1:Yes].
Press [F6:Draw]Your cardioid is drawn on the screen. This type of graph r=f(theta) is a polar graph.
Hope it helps.

Apr 17, 2009 | Casio FX-9750GPlus Calculator

3 Answers

How do i solve factorial problems

On the menu icon screen, highlight the Run icon. Press [OPTN][F6: ][F3:Prob] then [F1:x!].
Tu use the function you must enter the number and use [x!]
Hope it helps.

Nov 10, 2008 | Casio CFX 9850GA Plus Calculator

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