# Thread: Increasing or Decreasing Functions at an x value

1. ## Increasing or Decreasing Functions at an x value

I missed a math class and I really don't know where to start with this. Here are some examples of the problems, I just need an idea of the process here.

We just did derivatives, so I know how to do that. I've found a lot of information on how to find the intervals of where a function is increasing or decreasing, but not with an x value already given.

Determine if the function is increasing or decreasing at x=2.

1. f(x) = x^3 - 7x + 1

2. f(x) = (x - 3)^4

3. f(x) = cubed root of (x - 1)

4. f(x) = (x + 1)/(x - 2)

2. Originally Posted by ktprieto
I missed a math class and I really don't know where to start with this. Here are some examples of the problems, I just need an idea of the process here.

We just did derivatives, so I know how to do that. I've found a lot of information on how to find the intervals of where a function is increasing or decreasing, but not with an x value already given.

Determine if the function is increasing or decreasing at x=2.

1. f(x) = x^3 - 7x + 1

2. f(x) = (x - 3)^4

3. f(x) = cubed root of (x - 1)

4. f(x) = (x + 1)/(x - 2)