Question about Texas Instruments TI-85 Calculator
Finding cube root of x
Posted by Anonymous on
The easiest way to resolving this problem is to type x^(1/3)
See captured image
Posted on Mar 01, 2012
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Posted on Jan 02, 2017
SOURCE: HOW TO FIND CUBE ROOT
There is a way to do it. I believe you go into "complex" or "math" buttons. These buttons are yellow on the calculator. Therefore, to access them you must hit "2nd" then the button.
Better yet, you can also get around this dilemma another way. You can enter "the cubed root of x" by raising x to 1/3.
For example the cubed root of x = x^(1/3). It is best to place parentheses around 1/3 so the calculator knows exactly what you mean.
Another example, the "cubed root of (x + 1)" can be entered by:
(x+1)^(1/3) Note the parenteses around both (x+1) and (1/3). This applies if the radical cover both "x" and "1".
Hope this helps.
Posted on Nov 09, 2007
SOURCE: Cube roots
You use the y^x (y to the x) key along with the 2nd function key. That does the opposite operation.
So, let's pick something we know the answer to as an example. How about the cube root of 8? We know 8 = 2 X 2 X 2, so the cube root of 8 will be 2.
8 2nd y^x 3 =
The display will show 2.
The three is the root you want. You can put in any number, with 2 being the square root, 3 the cube root, etc.
Posted on May 17, 2008
You can calculate cube roots by using the cube root function (the 2nd-shift of the 0 key). You can calculate arbitrary roots by using the x-root function (the 2nd-shift of the y^x key, just above the divide key).
Posted on May 27, 2010
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