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How can i use exponents and ln ? - Texas Instruments TI-30XA Calculator

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For ln use the LN key on the top row of the keyboard. For e^x use the 2nd function of the LN key.

Posted on Dec 30, 2013


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Im trying to do a poisson distribution on my ti030xa. i dont care if i have to do it in pieces. i just dont understand how to do the e which is 2.71828 to the -3 exponent times 3 to the fourth power.

You want to enter an exponential of some sort. There is a key for that function. Look for the natural logarithm function whose key is marked [LN]. The exponential function key is accessed through [2nd] or [Shift] followed by [LN].
If exponent is negative, use the change sign key (-) or +/- to enter the negative sign, followed by the exponent.
See the screen capture that follows.


Nov 10, 2015 | Office Equipment & Supplies

2 Answers

Can my calculator do exponent calculations, "LN" calculations, and has memory capability? If so how do I use them?

Yes, yes, and yes.
You may view/download a copy of the manual at Owners Manual User Guide for Sharp el 531x scientific calculator
You'll find examples of exponential and logarithmic calculations in the second column of the second page and the memory instructions in the fourth column of the first page.

Jan 10, 2015 | Sharp el-531x scientific calculator

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How do i enter an exponent on the

It depends on the base of the power function.
For exponential function use [SHIFT][LN] (e^x) followed by the exponent value. If exponent is negative use the change sign +/- key before exponent.
For a general power, type in the base (number), then press the [Y^x] key followed by the exponent.
For a power of 10, use the [Exp] key. Careful here. For example to enter 1.6x10^(-19), type in 1.6, press the [Exp] key, then the change sign key +/- and the exponent. Press [=]
1 . 6 [Exp] +/- 19 [=]

Sep 28, 2014 | Sharp EL-531WBBK 12-Digit 272-Functions...

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How do you do exponential functions

Look for a key marked LN. Use SHIFT LN to access the exponential function. To enter the negative exponent use the change sign key (-) followed by 7. Press EXE/= to get the result.

Jun 16, 2012 | Casio FX-300MS Calculator

1 Answer

How do i use e?

On most calculators, a mathematical function and its inverse function share the same physical key. One function is accessed directly by pressing the key, the other function is accessed by pressing SHIFT and the function key.
The exponential function e^x is the inverse of natural log (ln(x))
To access the exponential e^x, press [SHIFT] [LN]. If the exponent is like yours, an expression not simple, enclose the expression in parentheses to ensure that the exponent is the one intended.

Feb 01, 2012 | Casio FX-300MS Calculator

1 Answer

Where is the exponent key on Casio fx-115es calculator?

To raise 10 to an exponent, use the 10^x function (SHIFT log). To raise e to an exponent, use the e^x function (SHIFT ln). To raise an arbitrary value to an exponent, use x^y (just above the sin key). To enter an exponent of ten, use the x10^x key to the right of the decimal point.

Oct 27, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How do I do e^(0.2)? When I enter e^(0.2) I get Syn ERROR.

  1. Press [2nd][LN] to activate the exponential function.
  2. Type in the exponent 0.2
  3. Press [EXE]

[2nd][LN]0.2[EXE] Result is 1.221452758

DO NOT PRESS [^] : this is the source of the syntax error.
You can put the exponent in parentheses.
If exponent is negative, press the change sign key (-) right after the e appears on screen.

[2nd][LN][(-)]0.2 [EXE] gives 0.8187307531

Sep 30, 2010 | Casio FX-9750GPlus Calculator

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Can you have negative exponents appear as a regular decimol?

I am not sure what you mean. I will try to guess.
If you use the universal power key marked [^] you can use any type of exponent, Just enclose the expression for the exponent in parentheses to avoid ambiguities.

EX: exponential of -3X+5
[2nd][LN] [( ] [(-)] 3 [X,T,Theta] [+] 5 [)]

If by exponents you mean powers the result will be displayed usually as decimals.

I suggest you enter the calculations you have to perform and press [ENTER]. The calculator will inform you in case of ERROR. In case of error with message QUIT or GOTO, select the GOTO option and you will be taken to the offending entry.

Jun 14, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

How to do exponents

To calculate x^y (x to the power of y), you may use this formula:
x^y = exp( y * ln x )

Type: x [LN] [*] y [=] [2nd] [LN]

Feb 09, 2010 | Texas Instruments TI-30 XIIS Calculator

1 Answer

I need to know how to put an exponent in square root form

To get an exponent press 2nd then LN or LOG

LN is natural logs, so entering 1 then 2nd LN gives you the natural exponent of 1 which is.2.71828....pressing LN gives you the natural log of 2.71828.... which is 1

LOG is logs to base 10, so entering 1 then 2nd LN gives you the 10 to the power 1 which is.10, pressing LOG gives you the log of 10 which is 1 again

Dec 04, 2008 | Texas Instruments TI-30XA Calculator

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