Question

Find the inverse function of f(x) = 6x3 - 8? Help!

Answer 1

What is the 6x3 term supposed to be? I can definitely help you if I know that lol XD

Answer 2

Lol! its 6x^3 sorry

Answer 3

No problem. Alright, so what you need to do is take f(x) and make that whole thing y

So, y = 6x^3 - 8

Solve for x. And that is how you get an inverse function. Try it and see what you get it.

Answer 4

You then replace the y value with a "x" and the solved x value with the f(x)^-1 sign

Answer 5

I have a hard time with math sorry! So to get rid of the exponent I would do 6^3 or would I cube root it? Im pretty sure its cube root but I don't know

Answer 6

Cube root :)

Answer 7

so would It be cube root 6x-8 or just 6x under the cube root?

Answer 8

or wait would I move he -8 over to the y and then it would be cube root of y-8?

Answer 9

Do you have a value you are going to have to plug in, or are you just looking for the inverse function?

Answer 10

Ok I think I got it! I got f(x)^-1 - cube root y-8 over 6! and just the inverse function

Answer 11

sorry not minus cuberoot I meant =

Answer 12

Looks good, except shouldn't the 8 be positive, since you added it over to the other side?

Answer 13

Yes! Lol I always make mistakes with those! Thank you so much for taking your time to help me! its very much appreciated!

Answer 14

No problem, glad I can help.