Question

on what interval if f(x) (x-4)/(x+8) increasing?

Answer 1

I know I have to derive, solve for x and use those interval. But when I solve for x I get nothing. What does that imply?

Answer 2

What you're trying to find are critical points, the x's and so when do they occur

Answer 3

Care to gave me a hand?

Answer 4

Critical points are where \[\Large f \prime (x)=0\]or when
\[\Large f \prime(x)=undefined\]

Answer 5

Undefined? :p

Answer 6

Undefined. Where there's a hole in the graph or where there's a vertical asymptote. You should look over your notes because you're gonna bed to see this

In the function yuo gave (x-4)(x+8), it's undefined at x= -8 because if you put that in there, then you'll be dividing by 0, which is a no no in math

Answer 7

in notation would, would it be something like (-inf, -8) (4,inf)? I'm not good with notation.

Answer 8

I appreciate your help btw.

Answer 9

Yeah, an yes it would, but make sure the notation is correct because you're saying from the left to -8 its increasing and then idk whats happening ont he interval -8,4 and the from 4 to the right it increases

Answer 10

1. find the derivative of the funciton

Answer 11

You know, I think I got it now. Thank you man. I appreciate.

Answer 12

Hang in there, is this calc?

Answer 13

Yeah...not my strong suit.

Answer 14

everyone has their own thing