Mathematics, 08.07.2019 04:30, maddyclark19

Hello i need with concavity of graphs. i have included a picture of the 4 problems i would love to be checked to see if they are correct. my main questions are: what do you do when there's more than 2 concave up/down? and how do you write it if one of the points is open such as in letter a

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Hello i need with concavity of graphs. i have included a picture of the 4 problems i would love to...