Question about Texas Instruments TI-83 Plus Calculator

# Gives wrong answer for power function

1/6 raised to the 4th power is giving me 7.716049383E-4. I know the right answer is .000771604. Why am I getting the wrong answer. How can I fix it.

Posted by Anonymous on

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Posted on Jan 02, 2017

Posted on Oct 07, 2007

SOURCE: fraction problem

Go into MODE to the second page.  In Exact/Approximate, change it to Approx instead of Auto or Exact.  This will give you decimals instead of fractions.

Posted on Nov 19, 2007

Your calculator will square a number before it applies the negative sign, so what you're actually doing is squaring 2, then applying the - sign to your answer. You need to put the -2 in parenthesis, so (-2)^2. That will give you 4. Hope this helps!

Posted on Nov 12, 2008

SOURCE: wrong trig ratio

Your calculator is set in radians. Press mode key. Arrow down to 3rd line. Highlight degree and press enter. Your calculator is now in degrees, not radians. To get out of the mode screen and back to home screen, press 2nd and then mode.

Posted on Aug 06, 2009

You're not squaring a negative number, you're negating a square. What you need to do is calculate (-2)^2 instead of the -(2^2) you're now calculating.

Posted on Feb 04, 2010

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## Related Questions:

### How do I find the 4th square root of 16 on a datexx ds-700 scientific calculator??

Roots are called as follows:

square root

cube /cubic root

From 4th on, use the ordinal fifth, sixth, ... n-th

To calculate the fourth root you have two possibilities.

1. Some calculators have the x-root key marked with an x followed by the radical symbol. See the screen capture on how to find your result.

Usually the x-root is the SHIFTED function of the general power key that is marked ( [^], [X^y], or [Y^x] ). To use it, you inter the index of the root (the ordinal number). then you press the [SHIFT/2nd/ 2nd] [X^y] sequence and the number whose root you are calculating).

2. Alternatively: Use the equivalence n-th Root (x)=x^(1/n), meaning that to extract the fourth root of 16, you raise 16 to the power of (1/4)

Sep 19, 2014 | DateXX DS-700 - 2 line LCD Display 224...

### Why is my ti84 giving me wrong answers when I use trig functions?

Your right you should be in degree mode. However, my guess is you are somehow entering in cot wrong in your calc. Recall cot = 1/tan! In your graphing calculator enter: 35(1/tan(61) = 19.4.
Hope this helped!

Jul 09, 2014 | Texas Instruments TI-84 Plus Calculator

### How to i solve this on my BA II Plus.. 10000(1.0075)raised to the negative power of 24? i dont know how to raise to a negative, it keeps giving me the wrong anwser :(

Assuming you mean 10000 times 1.0075 raised to the power of negative 24, press

1 0 0 0 0 * 1 . 0 0 7 5 y^x 2 4 +/- =

The y^x key is just above the 9 key. The +/- key is just below the 3 key.

Oct 11, 2012 | Texas Instruments BA-II Plus Calculator

### I am typing the shifted function of LN to get the e for poisson but it's not working. what am i doing wrong?

That function raises e to a number. If you want the value of e, raise e to the first power.

Press 1 2nd [e^x] =

Feb 18, 2011 | Texas Instruments TI-30XA Calculator

### When I substract log(2) from log(4) I get .301029957, the answer should be 2, what is wrong?

The answer for the problem log(4) - log(2) is actually 0.301, so the good news is that your calculator is working properly! Here's a quick breakdown of the solution for the problem:

1) We know that log(x) = N means that 10^N = x. So in this case, we need to find a number that 10 can be raised to in order to get 4 and 2.
2) To get a better idea of what the answer to the problem will be, we look at the scale of the numbers. 4 and 2 are both smaller than 10. In order to raise any number to a power and get a smaller number, that power must be less than 1. If the power was 1 or greater, the answer would be more than 10. Therefore, we know that log(4) is a decimal less than 1 and log(2) is a decimal less than 1.
3) Now we'll simplify the problem. A logarithm rule states that:

log(x) - log(y) = log(x/y)

We can use this rule to simplify the equation in the problem.

log(4) - log(2) = log(4/2)

Since 4/2 = 2,

log(4) - log(2) = log(4/2) = log(2)

4) Now to solve the equation, the only thing that must be calculated is log(2). This would be done on a calculator. In step 2, we analyzed that log(2) must be less than 1. Therefore, the calculator is correct with the answer 0.301.

Hope this helped!

Nov 30, 2010 | Texas Instruments TI-84 Plus Calculator

### My problem involves converting in chemistry and im just trying to figure out how to do a problem 0.58 x 6.022 x 10 raised to the 23/ 1. I know how to calculate the problem just cant read the answer a more...

Press the keys:
. 5 8 * 1 2 . 0 1 x^-1 * 6 . 0 2 2 2ND [EE] 2 3 ENTER
and you should get 2.9E22. Do you get something different?

* is the multiply key on the right, between divide and subtract.

x^-1 is on the left, below MATH.

EE is the 2ND function of the , key, just above the 7.

Another way to calculate this is:
. 5 8 / 1 2 . 0 1 * 6 . 0 2 2 2ND [EE] 2 3 ENTER

This should give you the same result.

Mar 10, 2010 | Texas Instruments TI-83 Plus Calculator

### My log functions are wrong

Hello,
It would help to know what you are trying to do or at least in what way you answers are wrong. I will do my best to guess right.

Ex: if you enter log(25) it gives you 2*log(5) and if you enter log(5) it echoes the same thing. If that is waht you get, it is easy to fix.
Press the Main icon at the bottom of the screen to open the calculator run screen. Unfold the first Menu to the left of Edit. Press Settings (first submenu) Press the/arrow and select Setup item, then Basic Format. Under Common tab you have the different formats: folder, display, angle, and Advanced. Put a check mark in the box to the left of Decimal Calculation an press Set to save configuration.

The other possibility is that you actived the 2D keyboard which gives you access to the 2d Function templates. You use these to calculate the log in arbitrary bases. Functions on this keyboard have a dark rectangle. If that is the source of your problem, use the stylus to select the mth keyboard.
Hope it helps.

Oct 10, 2009 | Casio ClassPad 300 Calculator

### Hi, I have a Casio calculator fx-991MS giving me wrong answers!

Hello,
I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation.

Let us try to reset your calculator to the normal (floating point) format.
Press the [MODE] key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4.

Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001. So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size.

Hope it helps.

Oct 01, 2009 | Casio FX-115ES Scientific Calculator

### Need to know

unless you can get them free , don't waste you time on them

Apr 18, 2017 | Cameras

### How do i use the inverse log operation on the TI-84

The problem is simple. You're trying to get an [H+] concentration which is obviously going to have a value of some number times ten raised to a negative power. Therefore, you have to insert the negative value of the pH into the 10^(x). When you insert said negative number you will come out with the right answer.
i.e.
The pH of a sample of human blood was calculated to be 7.41. What is the [H+] concentration of the blood?
10^(-7.41) = [H+]
[H+] = 3.9 E-8
(the answer should only have two sig. figs because the pH has two digits after the decimal.

Jun 10, 2008 | Texas Instruments TI-84 Plus Calculator

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