29: The domain is D( f ) = ℝ.
The second derivative is

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.

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