How To Evaluate Factorials On The TI-84 Plus

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HomeTechnology ArticlesElectronics ArticlesGraphing Calculators ArticlesHow to Evaluate Factorials on the TI-84 PlusByJeff McCalla C. C. Edwards Updated2016-03-26 14:01:36From the bookTI-84 Plus CE Graphing Calculator For DummiesShare

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Did you know you can type an exclamation point on your TI-84 Plus calculator? Mathematically, the exclamation point is called a factorial. Usually students learn about factorials in pre-algebra and then forget what they are by the time they need to use factorials to solve tough probability problems. Here is a quick refresher on factorials.

4! = 4*3*2*1 and 7! = 7*6*5*4*3*2*1. If you haven’t done so already, press [2nd][MODE] to get to the Home screen. Follow these steps to type a factorial in your calculator:

1. Enter the number you would like to take the factorial of.

2. Press the following keys to access the Math Probability menu

   

   and press [4] to choose the factorial symbol (it looks like an exclamation point.)

   There are more MATH submenus available on the TI-84 Plus C, if you use the TI-84 Plus, pay attention to the name of the submenu and use the left- and right-arrow keys to navigate to the correct one.

3. Press [ENTER] to evaluate the factorial.

   

About This Article

This article is from the book: 

TI-84 Plus CE Graphing Calculator For Dummies

About the book author:

Jeff McCalla teaches Algebra 2 and Pre-Calculus at St. Mary's Episcopal School in Memphis. He is a T3 instructor for Texas Instruments and co- founder of the TI-Nspire SuperUser group.

C.C. Edwards is an instructor at Coastal Carolina University and a former editor of Texas Instruments' Eightysomething, a newsletter for parents and educators.

This article can be found in the category: 

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