You are watching: How to do 5th root on ti-84

Before you start calculating cube roots, it"s helpful to recall what happens once a number is cubed. If you cube any type of number, friend multiply the number by itself three times. So come cube 4 (also created as 43), you"d main point 4 × 4 × 4, which equals 64. To cube 5 (also composed as 53), you"d main point 5 × 5 × 5, which amounts to 125 and so on.

A cube source is just the turning back operation, functioning backward native a number to find which other number, multiplied by itself 3 times, it s okay you that original number. For this reason the cube root of 125 is 5, because 53 = 125. Calculating cube roots by hand have the right to be tiresome at finest if friend don"t have them memorized, however calculating them v your calculator needs nothing an ext than a couple of keystrokes.

Enter the expression – that is, the number – you"re assessing the cube root of. Climate press get in to gain your answer. If you gotten in 343 your calculator would certainly return 7 as the answer because 73 = 343.

You can use a similar method to calculate various other roots ~ above the TI-84, TI-84 add to or TI-84 Plus silver Edition. You simply need to select a different duty from the mathematics menu.

Press the math key, adhered to by the 5 key. This opens an undefined source template, which can be provided for any index. The index is the tiny number that appears above and come the left that a root symbol for anything yet a square root. It tells you how many times the mystery number had actually to be multiplied with each other to develop the number under the root/radical sign.

Enter the table of contents of the root you want. You can enter 3 because that a cube root, 4 for a 4th root and also so on. Then press the best arrow vital and go into the expression you want to evaluate. This is the number the goes under the radical sign. Press enter to gain your result.

So, because that example, if you gotten in 4 as the table of contents to find the 4th root, climate 81 as the expression to be evaluated, you"d end up with an answer of 3, since 34 = 81.

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Lisa studied mathematics at the college of Alaska, Anchorage, and also spent numerous years tutoring high school and also university students with scary -- yet fun! -- mathematics subjects like algebra and also calculus.