18: The domain is
D( f ) = ℝ.
The derivative is
Critical points: The equation
f ′(x) = 0 has solutions
x = 0 and
x = 2.
There are no points in D( f ) where the derivative
does not exist.
Intervals of monotonicity will be
(−∞,0],
[0,2], and
[2,∞).
Determine monotonicity and local extrema using a chart.
Next hint
Answer