Question

How can you find the intervals on which f is increasing and decreasing when f(x)=(x^4)-(4x^3)+(4x^2)

Answer 1

Solve for x I guess. You know how to do that, right? Then, you make a chart with the data...

Answer 2

all i did so far was find the derivative and replaced f(x) with 0

Answer 3

and found x= 0, 5, and -1

Answer 4

Ok. Those will be your interval points. They go: (infinity,o)(0,5) and (5,-1)

Answer 5

To find the y-int, sub in x=0

Answer 6

what do you mean?

Answer 7

I mean that you make x=0 to for the y-intercept.