Asked by L.P.

I am absolutly stumped at how to solve this. I know for squared functions you take the square root of both sides to solve for x but what about if one side is cubed. I know you would have to take the cubed root of the function but how do you do this on a calculator?

equation is: 3.9*10^-11 = 4*X^3
so I simplify and get:

9.75*10^-12 = x^3
but now how to solve on calculator?
Answered by bobpursley
the x<sup>y</sup> key allows cube roots.
( some calc have it as y<sup>x</sup> key)
for instance, the cube root of 27

enter 27
press x<sup>y</sup>
enter (1 divide 3 )
you should see 3, and some will require you to press enter.
Answered by L.P.
okay sounds easy but I have a TI-84+ and I don't see that key.

also will this work for say x^5 or x^4?

If you don't have this key how would you solve it?
Answered by bobpursley
yes, works for any root, or power.

If you don't have that key, you can do it with logs....
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