Hii i have the model CASIO fx- 991 ES & in that 1. I need to perform the integration. say for example integration of log(X), For this if i don't want to specify the limits then how should i give the expression because without specifying the limits it is giving syntax error.
2. The second one is if i need to specify the limit as 0 to infinity or -infinity to infinity then how could it be possible in this model?
Please help me in this regard. Looking forward for the positive reply.
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Re: Integration with limits & with out limits
Hello, This calculator can only perform NUMERICAL DEFINITE integrals. Which meansyou have to supply the numerical value of the lower limit and the numerical value of the upper limit. The result is a numerical value. The calculator cannot perform symbolic calculus.
If the function is simple you find the integral in tables of integrals where you will see that INT(log(X)dx=x(log(x)+1). Some calculators that have a CAS (computer algebra system) can manipulate symbolic expression, but not theCasio FX-991ES.
You ask it the value of the integral of log(X) from X=1 to X=3 and it will give you 0.5627748004
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For definite integrals, use the [integral] key just below and left of the big round cursor pad. For example, to calculate the definite integral of x^2 dx from 0 to 1, press [integral] [alpha] [X] [cursor-right]  [cursor-right]  [=]. After about a second you should see 1/3.
Press SHIFT [MATRIX], specify the matrix to be inverted, then x^-1.
Example #103 in the appendix shows the exact procedure for inverting the matrix entered in example #096. If you need the manual and the appendix, you can download them from http://support.casio.com/manualfile.php?rgn=1&cid=004001004
Sorry to disappoint you but the Casio FX-9750Gplus does not handle symbolic calculations. It does not have a Computer Algebra System or CAS. It can however calculate the numerical integration of a function between two limits, as well as the first and second derivatives of a function at a given point.
To access the numerical integration and differentiation,
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:
Press the 'ON' key;
Press the Integral key ;
Enter your expression (example X^2+X-3 etc);
Press the 'comma' key after your expression;
Input the first limit after comma, input comma again after first limit;
Press the equals key, display may return after a while with the answer.
for eg to calculate ∫xdx from 0 to 2, input as follows:
To calculate derivative at a point:
Press Shift and then the integration key.
Enter your function;
input the point at which you want to evaluate the derivative;
First you have to computational mode to [MODE][1:Comp]. Then press [SHIFT][MODE][1:MthIO]. Press the Integral, a template with the distinctive Integral (Snake) sign appears, with two small rectangles for the limits, a larger rectangle for the function, and dx. The cursor will be blinking in the large level-line rectangle. Enter your function using the [ALPHA] [Letter] combinations to enter X,Y,A,B,C,or D, then use the Down Arrow to enter the lower limit, then the Up Arrow for the upper limits. After you finish press the [=] to get the numerical result. You cannot obtain primitives, just numerical values.