Identify the interval on which the function F(x)= 4 - x^2 is increasing or decreasing. Write your answer using interval notation.
My answer was decreasing: (-infinity to infinity) and increasing: (0 to infinity). It was marked wrong. How do I do this problem?
Thanks
Surely it should be obvious that the function cannot be both increasing and decreasing on (0 to infinity)! Did you mean "decreasing on and increasing on "?
That's not correct because the graph of is a parabola that opens downward. f(x) is increasing for x< 0 and decreasing for x> 0.