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Feb
18
awarded  Scholar
Feb
18
accepted Finding the inflection point for a function
Sep
17
awarded  Student
Sep
16
comment Finding the inflection point for a function
If the signs of $ f'' $ to the left and to the right were different (or equal) I could use the test of the second derivative to assert something about the concavity, but as far as I understand this is not the case (I can't imply anything about the signs of $ f'' $ from $ f' $). What am I missing here?
Sep
16
awarded  Supporter
Sep
16
asked Finding the inflection point for a function
Sep
16
awarded  Autobiographer