Solution 10574: Calculating Nth Roots Using the TI-85 and TI-86.
How do I perform nth root computations using the TI-85 and TI-86?
The instructions below will demonstrate how to perform the nth root computations on the TI-85 and TI-86 graphing calculators.
Example: Compute the cube root of 27.
1) Press [ON]
2) Press [2nd]
3) Press [x] (the multiplication key) *notice above the multiplication key the word MATH in yellow
4) Press [F5] *menu title MISC
5) Press [MORE]
6) Press the number 
7) Press [F4]
8) Press 
9) Press [ENTER]
An answer of 3 is given on the right side of the display.
Please see the TI-85 and TI-86 guidebooks for additional information.
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