5: The second derivative is
Dividing points: f ′′ = 0 gives x equal to plus or minus 1 over root of 3; there are no points in D( f ) where f ′′ does not exist.
Inflection points: at plus and minus 1 over root of 3, with value 3/4.
Now draw coordinate axes and mark all points and trends we learned so far.
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