17: The second derivative is

Dividing points: f ′′ = 0 gives x = 0 and x equal to plus and minus root of 3; there are no points in D( f ) where f ′′ does not exist.

Inflection points: f (0) = 0 and at plus and minus root of 3 with value plus or minus root of 3 divided by 4, respectively.

Now draw coordinate axes and mark all points and trends we learned so far.

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