Help me with the interval notation? https://postimg.org/image/bpb7ibnnr/

Question

sweetburger · Answer

Your actual interval notation is not wrong. What may be wrong is the numbers that you have in the interval notation.

shauna77777 · Answer

But I thought the zeros were -8, and 1 ~~ when I solved for x I mean

sweetburger · Answer

To find areas where the function is increasing you need to take the first derivative. Then determine whether the 1st derivative has any values that make the 1st derivative undefined that did not make the original function undefined. Then set the 1st derivative equal to 0 and solve for x.

shauna77777 · Answer

I got 16-7x/x^3 for f'(x)

sweetburger · Answer

Yes that is the correct 1st derivative.

shauna77777 · Answer

So would that mean mt first point is 0 (for being undefined) and the other is whatever x equals?

sweetburger · Answer

yes 0 would be on your number line and the other point(s) would be whatever x equals

shauna77777 · Answer

Ah! Ok I see I was solving for the zeros. Thank you very much!

sweetburger · Answer

np glad to help :)