Question about Casio FX-115ES Scientific Calculator

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Random variable value x of X P(X=x) 3 .15 4 .40 5 .05 6 .10 7 .30

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Posted on Oct 26, 2008

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What is an dependent variable

All values that arise as influenced by changes in the values of other variable. Or, Dependent Variable is the observed factor.
If we have a Linear Function as
Y = mX + C
Y should be Dependent Variable,
X as Independent Variable,
m as Coefficient and
C as Constant.

Aug 30, 2016 | Office Equipment & Supplies

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What is an independent variable?

An independent variable is not directly or indirectly related to another

Aug 30, 2016 | Office Equipment & Supplies

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How do I enter an unknown variable? Example 2(3x-4)

You have several variables but the only ones you have access to are the letters from A to F, the letters x and y, and the Memory M.
To store a value in variable x, enter the value, press [STO] followed by the key that has an x near it. To recall a value sotred in a letter variable press [RCL] followed by the appropriate key (the one that has a letter above it).
But you cannot do any algebra with this calculator, if that is what you are attempting to do. And please do read the manual that shipped with the calculator that is the best reference to the capabilities of the machine.

Sep 19, 2013 | Sharp el-531x scientific calculator

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Im trying to use Algebra on the new calculator I bought, as its important for my school use. As an example, I write: 3x+3x and that result is 0? How come? Shouldn't it be 6x?

This calculator cannot do algebra ( manipulating expressions with letter symbols) . It does not have a CAS (computer Algebra System). All it can do is evaluate (find the numerical value of) expressions typed in. If it has the appropriate keys to enter variables such as A,B,C, or X and Y., and you entered an expression with variables it will use the numerical values stored in the variables. If you have not stored anything in a variable, it is given the value 0 by default.

Aug 25, 2011 | Texas Instruments TI-30 XIIS Calculator

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Casio fx-991ES, how to calculate NPV and IRR

At a blank screen, enter your IRR formula in terms of the variables using ALPHA and ')' for variable X. For example: -1000 200/((1 X)^1) 200/((1 X)^2) ... rest of subsequent years. Then, press CALC. It will prompt you to enter values of your variable (X in this example). Don't worry if there's already a value displayed - this is just the most recent value that has been stored as that letter. Simply enter your value (in terms of your IRR guess) and then press [=]. You will have to repeat this for each IRR guess until you reach almost ZERO.

Feb 11, 2011 | Office Equipment & Supplies

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How to store and recall on fx-115es

To store a value into one of the variables A, B, C, D, X, Y, press SHIFT [STO] and the variable name.
To recall a value from one of them, press RCL and the variable name.

Oct 12, 2010 | Casio FX-115ES Scientific Calculator

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CASIO fx-300ES

  1. To store numerical values in the variables A,B,C,D,X,Y and M you use the [SHIFT][RCL] key combination to access the (STOre) function.
  2. In what follows [ key] is the physical key and (key) is the SHIFTED key
  3. ex: store the value 13 in variable A
  4. 13 [SHIFT][RCL] (STORE) [(-)] (A)
  5. The calculator displays 13 --> A on top line and 13.000.. on bottom line.
  • To recall a value stored in a variable ex: recall value stored in variable A
  • Press [RCL][(-)] (A)
  • Calculator displays A on top line and 13 on bottom line.
If you need to use the variables A,B,C,D,X,Y, and the = sign to create an expression to be solved with the solve( function you must press the [ALPHA] key

=: [ALPHA] [CALC](=)
A: [ALPHA][(-)] (A)
B: [ALPHA][ 0 ' "] (B)
X: [ALPHA][ ) ] (X)
Y:[ALPHA][S<=>D] (Y)

Jan 05, 2010 | Casio fx-300ES Calculator

1 Answer

How do enter a lim of function when from one side using nderiv

nDeriv( is valid only for real variables.
The syntax is as follows:
nDeriv ( expression, variable, value, epsilon)

expression: the function the derivative of which you want to calculate
variable: the name of the variable in the expression above (usually x)
value: the numerical value of the e x where you evaluate the derivative
epsilon: the numerical value of the tolerance. Default is 1x10^(-3). But you can change it to a smaller value to obtain a more precise result.

To use default value of epsilon
nDeriv ( expression, variable, value)

To use a different epsilon, ex 1x10^(-4)
nDeriv ( expression, variable, value, 0.0001)

nDeriv( A^3 , A, 5., 0.0001) should give you 75

Hope it helps.

Oct 21, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

How to use the arc length function

The arcLen() function is in fact a definite integral: You need the function, the name of the variable, the starting value of the variable, and the final value of the variable.

The syntax is as follows:

arcLen(expression1, variable, begining value, end value)

arcLen( f(x), x, a, b)
arcLen (cos(x), x, 0, pi) calculates the arc length of the cosine function from x=0 to x=pi

Hope it helps

Mar 31, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Find square of -x


I do not know how you could have obtained the first result: The only possibility is that your X has been assigned a value of 1. Even if it was the case, the calculculator shown on the left (TI83PLUS SILVER Edition) does not do symbolic algebra.

For the second case, I suspect some way or other, the variable X store a value of 10. When you enter (-X)^2 the calculator retrieves the value stored in the variable X and performs the calculation, which does yield 100.

Note: to store a value in one of the 26 variables (letters) you proceed as follow
The screen displays 10->X
When you press ENTER it displays 10.0..

To recall a value stored in the X variable you type

Hope it clarifies the question.

Feb 12, 2009 | Texas Instruments TI-83 Plus Silver...

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