20 Most Recent Casio Brand New-Fx-991es Plus - Scientific Calculator - Page 7 Questions & Answers

Press the Shift/Mode key and set the Input/Output to MathIO. Even that will not guarantee that the display will be in root form. Only square roots are possible.

You cannot. It is not a graphing calculator.

Press the Shift Mode button and select LineIO instead of MathIO. MathIO shows you the result as a stacked fraction (with numerator on top of Denominator), which is rather neat.

No, we actually have not one part for any product at all. We are an information service only. Please type your needs into the search engine of your computer and see if there is a dealer who can help you. God bless your efforts.

Page 46 of the scanned copy of the manual or near by pages describes an all clear procedure that unfortunately for you deletes all data if the password is unknown. https://www.manualslib.com/manual/358559/Casio-Sf-4000.html CASIO SF 4000 Operation Manual

I suggest you play with key combinations (Shift + some key) to discover if there is any beautiful template that gets generated by it.

Change the output display to MathIO. You may be able to display square roots only: so no cube roots, nor fourth...

You are supposed to do Venn diagrams by hand. If you think you need a calculator for that, then you do not understand what Venn diagrams are.

I don<t think you can. Even if you could, you would not be able to find a solution. You need three equations in three unknowns. You only have two.

Read the manual. It is more likely that you are not using it correctly.

If the calculator has this feature, then you should set it to Matrix calculations. Then you define appropriate matrices.

If the i8ntegral is difficult to calculate, it may take a long time. During the calculation, the machine is busy and does not answer.

The print head needs cleaning. Use a cotton swab and alcohol to clean it.

Remove the battery.

You should try SHIFT AC (Off).

Just as you do it by hand. To input X press Alpha key then ). The question I ask is what do you want to do? The = sign is a problem. If you do not have a second = sign (Shift =) then the calculator cannot handle the problem you want to solve.

Press the S-D button to switch between fractions and decimals.

http://www.mas.ncl.ac.uk/~ndah6/teaching/MAS1403/tutorial3.pdf http://www.mas.ncl.ac.uk/~ndah6/teaching/MAS1403/tutorial3.pdf

I've hunted and hunted for you but it looks like a "Repair Center" item? Start here: https://www.casio.com/support/authorized-service Authorized Service and Support-Service Centers Primary Warranty Authorized Service Centers (U.S.A.) For Musical Instruments (Models AL, AP, PX, WK only), please go here.

East Coast Service Location

Casio Factory Service Center(Opens the Casio Factory Service Center website in new window)(Opens the website in new window)

West Coast Service Location

The Time Machine 2335 Honolulu Avenue Suite B Montrose, CA 91020 Phone: 818-249-6007 Fax: 818-249-9412