Question about Casio FX9750GII Graphic Calculator

# How to use function Sigma notation on Casio fx115 ES plus

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• Casio Master

Press [SHIFT][Log_ab], below the ON button. Better use the MathIO input/Output mode.

Posted on Aug 27, 2014

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Posted on Jan 02, 2017

SOURCE: how do I do brackets

Brackets are right on the keyboard

Posted on Jul 05, 2011

SOURCE: I am working on algebra

You can set the number display mode to be SCI. Press [SHIF][MODE] and look for the number to the right of which is written SCI. Enter that number. You may be asked to specify the number of digits after the decimal mark 0 tilda 9. Select an appropriate number and enter the corresponding key.
If you want to ENTER numbers in scientific format, enter them the usual way. When you arrive to the power of 10 press the [x 10^X] key, followed by the exponent. Use the change sign key (-) to enter a negative exponent.

Posted on Jul 30, 2011

SOURCE: Algebra

Yes it can be keyed in.
To enter the X, use the ALPHA followed by ). To enter the = sign, you use [ALPHA][CALC].
To use the calculator to SOLVE an equation you must enter the equation, then press [SHIFT][CALC] to (SOLVE). You will be prompted to solve for X. Follow it from there.

As to the case you show, the constant terms will drop and you are left with 26X=0, and the solution is X=0.

Note: The calculator cannot do algebra with letter symbols. It does not have a Computer Algebra System or CAS.

Posted on Mar 29, 2012

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## Related Questions:

### How to do sigma notation?

The calculator cannot add the terms of a sequence. You need a graphing calculator that has that feature, or a calculator with a CAS (Computer Algebra System).

Aug 10, 2014 | Casio FX-270W Calculator

### Calculate the inverse of a 4X4 matrix on fx-570ms

The Casio FX-570MS does not handle matrices. So you cannot create matrices, let alone invert them. Sorry.
The Casio FX115 ES handles matrices for up to 3X3 dimension. Create the matrix.Have its name displayed on the command line and press the [x^-1] (reciprocal ) key.

Apr 16, 2014 | Casio FX-115ES Scientific Calculator

### I can't use an imaginary number in a sigma notation

The summation function only works in the real mode, not the complex mode. You'll find that the same limitation applies to many other functions, such as the integration.

See page E-42 of this manual for the functions that are allowable in complex mode.

Apr 19, 2013 | Casio FX-115ES Scientific Calculator

### What button do i use for factorial on my Fx115-ES

It's the shifted function of the x^-1 button, located just below and right of the big round cursor pad, above the log button.

Feb 17, 2013 | Casio FX-115ES Scientific Calculator

### Sigma notation on fx9750gii

The syntax is
Sigma ( function (n),index n, starting value of index n, ending value of index n, increment of n).
If you omit the increment of the index the calculator will assume it is equal to 1

Dec 02, 2012 | Casio FX9750GII Graphic Calculator

### How can i enter a matrix in fx-82ES?

You cannot do matrices with this calculator. Use an FX991 ES, or FX115 ES.

Nov 03, 2012 | Casio FX82ES Scientific Calculator

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