Describing Set of Absolute Maxima for a Concave Function

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Homework Statement



Let f(x) be concave, how do you describe its set of absolute maxima

Homework Equations





The Attempt at a Solution

 
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Are you not even capable of reading the rules for this forum? Show what work you have done on this yourself. If nothing else, at least look up and state the definition of "convex" function.
 

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