f '(−3) = f '(−2) = f '(0) = f '(1) = 0,
f '(x) < 0 if x < −3 or −2 < x < 0 or x > 1
f '(x) > 0 if −3 < x < −2 or 0 < x < 1
f ''(x) < 0 if −2.5 < x < −1 or x > 0.5
f ''(x) > 0 if x < −2.5 or −1 < x < 0.5
Sketch the graph of a function
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