Question about Texas Instruments TI-30XA Calculator

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Reposting! exponential and log equations

I just posted this question, the equation is actually   LN4 divided by LN4-2LN3
how do i put this in the calculator?

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Use this entry sequence:

4 LN / ( 4 LN - 2 X 3 LN ) =

or this one which evaluates the divisor first

4 LN - 2 X 3 LN = 1/x X 4 LN

Posted on Dec 31, 2008


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Why when -2x divide x = math error

I think the problem with this equation comes when x = 0. At this point, it is undefined. Thus, it is a horizontal line y=-2, except when x=0. This is normally signified by putting an open circle when x=0.

I hope I answered you question. If not, repost.

Good luck,


Sep 09, 2016 | Casio FX-82MS Scientific Calculator

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Dividing 2 different scientic equations into another

Sorry but you are using the word EQUATION incorrectly. All you have is two numbers you want to divide one by the other.
Enter the numerator 1EE (-) 14, press the division key / then enter the 5 EE (-) 12. Press the = sign.
Note: to enter the negative sign in the exponents, use the change sign key marked (-), (+/-) or [+/-] . Do not use the regular MINUS sign.
When you use the EE key, you must not enter the 10. It is understood because EE is a shortcut for *10^.

Apr 06, 2014 | Texas Instruments TI-30XA Calculator

1 Answer

How to find values of x in higher order equations(above cube) on casio 570 ES?

In equation mode, you have system of linear equations (3 unknown) you have polynomial (quadratic and cubic), and solver. Use the solver foe any type of equation (nonlinear, polynomial of order higher than 4, trigonometric, exponential, logs).

May 21, 2012 | Casio Scientific Calculator Fx-570 Fx570...

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I am trying 0.037 Amps to milliamperes by useing the x10x button i am preety sure i should press 0.037x10-3 but the answer comes up 37/1000000 when the answer should be 37 not sure if the calculators set...

Prefixes such as milli already reflect the corresponding multiplier or divisor. One milliamp is 1/1000th of an Amp, so 37 milliamps = 0.037 of an Amp.

To keep two sides of an equation the same, you need to perform the same operation on each side. In this case, the equation is 37/1000 = 0.037. The "divide by 1000" part of this equation is included in the word "milliamp", hence 37 milliamps = 0.037 Amps.

Another way of looking at it is that a number remains unchanged if you both divide and multiply it by the same number. In this case, changing to milliamps is dividing by 1000, so you need to multiply by 1000 to keep the result unchanged.

You have actually divided by 1000 twice as a result of using x10^-3 as a multiplier when you should have used x10^3

Nov 26, 2011 | Casio fx-300ES Calculator

1 Answer

If an equation would require dividing by log ( which og course can't be done) what button is used to fulfil that equation?

Of course you can divide by a log. As an example, to divide 2 by the log of 3, press
2 / 3 LOG =
To divide 2 by the natural log of 3, press
2 / 3 LN =

Oct 27, 2011 | Texas Instruments TI-30XA Calculator

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How do you find the equation of a exponential graph

Usually ypu know the equation then graph it. However in doing statistics, it may appear that the curve of best for a scatter plot could be could an exponential. In that case you use the STAT application to enter the x-data in List 1 and the y-data in List 2. When you finish press the f1 key to select Graph1. You should also verify by Pressing F6:set that the graph type is set to scatter, and that List 1 contains the x-data and List 2, the y-data. After you verify that all is in order press the F1: Graph 1 key.
As the graph is displayed you will see several tabs with various regression models. Pan thr tabs to the right to get to F2:EXP. Select it.
The equation is displayed on the next screen. At the bottom of the screen you see two tabs COPY and DRAW. Press f5:Copy to copy the equation in one of the y= functions.
Press Draw and you will see the curve of best fit superposed on the scatter plot points.

Aug 23, 2011 | Casio FX-9750GPlus Calculator

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What are the equations and its kinds?


A mathematical statement used to evaluate a value. An equation can use any combination of mathematical operations, including addition, subtraction, division, or multiplication. An equation can be already established due to the properties of numbers (2 + 2 = 4), or can be filled solely with variables which can be replaced with numerical values to get a resulting value. For example, the equation to calculate return on sales is: Net income ÷ Sales revenue = Return on Sales. When the values for net income and sales revenue are plugged into the equation, you are able to calculate the value of return on sales.

There are many types of mathematical equations.

1. Linear Equations y= mx + b (standard form of linear equation)
2. Quadratic Equations y= ax^2+bx+c
3. Exponential Equations y= ab^x
4. Cubic Equations y=ax^3+ bx^2+cx+d
5. Quartic Equations y= ax^4+ bx^3+ cx^2+ dx+ e
6. Equation of a circle (x-h)^2+(y-k)^2= r^2
7. Constant equation y= 9 (basically y has to equal a number for it to be a constant equation).
8. Proportional equations y=kx; y= k/x, etc.

Jun 14, 2011 | Computers & Internet

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How do I enter in equations with logarithms that have bases other than 10 or e?

If you want to take the log of X using base B, where B is an arbitrary number, use the following equation:

logB(X) = log10(X) / log10(B)

In words this is the log base B of X equals the log base 10 of X divided by the log base 10 of B. This equation can now be solved using your calculator.

I hope this helps you out.

Feb 09, 2011 | Vacuums

1 Answer

Is there any way you can find the derivative without saying a point value?

Do you mean as in a linear equation? If so it is simple the slope of the equation. If you are referring to an exponential equation the derivative is always changing so no.

Sep 23, 2010 | Texas Instruments TI-Nspire Graphic...

1 Answer

Exponential and logarithmic equations

You re-asked this question more clearly and I answered it.....

Dec 14, 2008 | Texas Instruments TI-30XA Calculator

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