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Solve clearly Question A]. (15 marks) Consider the following claim: Ifa decision maker has a quasi-concave utility function u on the [0, 1] interval,

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Solve clearly

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Question A]. (15 marks) Consider the following claim: " Ifa decision maker has a quasi-concave utility function u on the [0, 1] interval, then u has a maximizer.\" Is this claim true or false? If true, provide a proof. Otherwise, provide a counterexample. Show your work

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