Question: = . Consider the minimization problem M(p, y) = min x-U(x) s.t. pl X1 + ... + pn xn sy where U:Rn R is continuous.

= . Consider the minimization problem M(p, y) = min x-U(x)

= . Consider the minimization problem M(p, y) = min x-U(x) s.t. pl X1 + ... + pn xn sy where U:Rn R is continuous. Prove that the function Map, y): R n + x R+ Ris quasi-concave. (Hint: the subscript + means that all elements of a vector are nonnegative and at least one is strictly larger than zero.]

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