TI-85 or TI-86 Calculator Tutorial - x!

The factorial command, denoted by an exclamation point (!), involves using some of the calculator's menus. If you want to evaluate 12!, enter 12. Then choose the MATH menu. It is above the times key in the right hand column.

Then use the F2 key to choose the PROB menu. You will then see the ! as one of the options. Press the F1 key to choose !. Up on the main screen you will see 12!. Press Enter. You should see an answer of 479001600. Note that factorial values get very large, very quickly. You will likely run into some answers that are too large to fit in your calculator display so scientific notation will need to be used. For example, 17! will result in an answer like 3.556874281 x 1014.

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Date Last Modified - 11/5/99
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