Question about Texas Instruments TI-85 Calculator

# Can I do sigma notation on a ti-85? - Texas Instruments TI-85 Calculator

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Posted on Jan 02, 2017

SOURCE: can i do sigma notation

No. There are some keys on the TI-30XA that may make you think so, but they are statistical operations. For example, you can enter values using the Sigma+ key and the TI-30XA can give you the sum of the values entered, sum of the squares, mean value, standard deviation and so on.

You cannot do calculations like "Give me the sum of all integers from 1 to 100" with the TI-30XA, you'd need a far more sophisticated calculator.

Posted on Jan 06, 2011

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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

### 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

### 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

### Can i do sigma notation on a ti-30xa calculator?

No. There are some keys on the TI-30XA that may make you think so, but they are statistical operations. For example, you can enter values using the Sigma+ key and the TI-30XA can give you the sum of the values entered, sum of the squares, mean value, standard deviation and so on.

You cannot do calculations like "Give me the sum of all integers from 1 to 100" with the TI-30XA, you'd need a far more sophisticated calculator.

Jan 06, 2011 | Texas Instruments TI-30XA Calculator

### If I enter the following equation: 1/9+1-1-1/9 my calculator displays -1E-14 but the answer is 0. Please, explain

This is because the TI-85, like any other calculator, is a finite device and 1/9 cannot be represented exactly in decimal notation.

For this discussion I'm going to use five digits instead of fouteen so it's easier to see.

1/9 = .11111

+1 = 1.1111 (note one digit falls off the right end)

-1 = .1111 (the missing digit doesn't come back)

-1/9 = -.00001

Apr 09, 2010 | Texas Instruments TI-85 Calculator

### If a textbook problem is given in DMS notation, how do I enter the DMS notation into the TI84 to get decimal degrees?

On this family of calculators, you do as follows
Enter the first number (degrees), ex:15
Press [2nd][APPS] (ANGLE) to access the Angle functions
Select [1: degree symbol] [ENTER]
Main screen shows 15 deg
Enter the minutes, ex 25
Press [2nd] [APPS](ANGLE) to access Angle functions
Select [2:' apostrophe] [ENTER]
Screen echoes 15 deg 25'
Enter the seconds number, ex 32
Press [2nd][+] (") to access the double quotation mark
Screen echoes 15 deg 25' 32"
Press [ENTER]
Calculator converts this in decimal degrees 15.42555556

To convert this back to DMS, press [ANGLE][|=>DMS][ENTER] and the calculator displays the original value 15 deg 25' 32"

Jan 06, 2010 | Texas Instruments TI-85 Calculator

### Hoe do you use logarithm on TI-36X SOLAR?

Basically you first have to put your answer into scientific notation by pressing the 3rd key then the 6 key. The screen display should change to one big zero and two small zeros.

I was workinggon the same problem with a -log of a chemistry problem to get pH and I knew the answer because I calculated it on it TI-85, but we are not allowed to use graphing calulators on the exam (:-((() so I had to figure out how to do it on this one!

For example, I had pH =-log(2.828947x10^4)

On the TI-36X you change to scientific notation using the instructions above. Once the three zeros enter on the screen:
[4]
[-]
[2nd]
[10^x]

1^-04 should appear on screen, then you multiply by 2.828947

[x]
[2][.][828947]
then your screen will show the answer in scientific notation.

2.828947 in big numbers and in small numbers -04
From there you simply press:
[log]
and your answer will show up as a negative number. Just take the absolute value of that and you have your answer. Took me like 30 minutes the night before a huge chemistry exam to figure that out! Hope it helps someone!

May 09, 2009 | Texas Instruments TI-36 X Solar Calculator

### Inputing scientific notation into my calculator

Hello,

1. To convert a number to scientific equation, use [2nd][Sci]
Exemples 12345 [=] screen shows 12345 Then [2nd][Sci] coverts it to 1.2345 ^04 to the power 4.
2. To enter directly a number in scientific notation (e.g. -1.2345 X10^(-65) a very small number) you use the [EE] key 1.2345[+ /-][EE][+/-]65 shows as -1.2345 -65
1.6X10^(-19) 1.6[EE][+/-]19 shows as 1.6 -19

Hope it helps

Jan 09, 2009 | Texas Instruments TI-30XA Calculator

### Scientific notation

You have to use the EE button right next to the parenthesis and the sigma plus button. So 1.7 EE and then your exponenet. If it is a negative exponent you need to hit the negative button before you type in the number.

Mar 24, 2008 | Texas Instruments TI-30XA Calculator

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