# How To Solve For Sigma On A TI83

The TI-83 is a graphing calculator that is used for mathematics; sigma is the Greek letter used in math used to designate summations. With a given function and limit, you can easily enter a summation equation into your TI-83 and solve for sigma. This way you can avoid having to solve the equation by hand and save time.

### Step 1

Press and hold the "2nd" button, then press "STAT."

### Step 2

Scroll to the right to the "MATH" option, then press "5."

### Step 3

Press and hold the "2nd" button then press "STAT."

### Step 4

Scroll to the right to select the "OPS" option, then press "5." You will now have "Sum(Seq(" on your screen.

### Step 5

Enter the equation to the right of igma, then add a comma. For example, if the equation is 3x+2, then type "3x+2," into the TI-83.

### Step 6

Enter the value of x followed by a comma. This is located under the sigma symbol in the equation. For example, if in the equation is says "x=5" then type "5," into the calculator.

### Step 7

Enter the value above the Sigma symbol. Follow the value with a comma. If the value in your equation is 7, then you would enter "7,"

### Step 8

Enter "1" and finish with "))." If entered properly, your calculator would read something like this: "Sum(Seq(3x+2,X,5,7,1))"

### Step 9

Press the "Enter" key to solve for sigma.

### References

- "TI-83 Plus Graphing Calculator for Dummies"; C. C. Edwards; 2003

### Cite This Article

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Ramone, Paul. "How To Solve For Sigma On A TI83" *sciencing.com*, https://www.sciencing.com/solve-sigma-ti83-7827062/. 24 April 2017.

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Ramone, Paul. (2017, April 24). How To Solve For Sigma On A TI83. *sciencing.com*. Retrieved from https://www.sciencing.com/solve-sigma-ti83-7827062/

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Ramone, Paul. How To Solve For Sigma On A TI83 last modified March 24, 2022. https://www.sciencing.com/solve-sigma-ti83-7827062/