29: The domain is
D( f ) = ℝ.
The second derivative is
![](gif6/ecc6cf2.gif)
Dividing points: The equation
f ′′(x) = 0 has solution
x = 8.
The second derivative does not exist at x = 0.
Intervals of concavity will be
(−∞,0],
[0,8], and
[8,∞).
Determine concavity and points of inflection using a chart.
Next hint
Answer