Question about Office Equipment & Supplies
How to save formula in this calculator
You may be able to enter an expression in the SOLVER but it will be erased if you change calculation MODE or turn the calculator Off.
To enter an expression with letter symbols you Press the ALPHA key then the letter (A,B,C,D, X,Y).
Posted on Dec 14, 2012
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Posted on Jan 02, 2017
SOURCE: m mod n in Casio fx991MS
there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to
1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...
Posted on Jun 29, 2009
Here is the solution for th FX-991ES.
The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.
Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix
The matrix used in the exemple is
a_11=2 a_12=1 a_21=1 a_22=2
Here is the link to download the manual and the appendix
The link is for FX991ES. Look there foe you manual.
Hope it helps
Posted on Sep 07, 2009
I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.
Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.
Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.
Hope it helps.
Posted on Oct 02, 2009
Testimonial: "Thanks so much, its working now:) I thought I was going to have to buy a new calculator!"
If you want to get an answer like 1/2X for d/dx(X^2), you will have to
purchase a CAS calculator like Casio's Algebra FX-2 or Classpad. TI series calculators also have CAS.
However, you can calculate the numerical values of derivatives and integrals only.
To calculate the value of a proper integral:
To calculate derivative at a point:
SHIFT+∫dx key X^2,3)
Display looks like this: d/dx(X^2,3).
Posted on Oct 23, 2009
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