Question: im stuck here please solve this question Let f : Rn - Rm be given by f(x) = Ar + b where A is an

im stuck here please solve this question

Let f : Rn - Rm be given by f(x) = Ar + b where A is an m x n matrix and be Rm. Let S E Rm be convex. Prove that the set Q := {r ER" : f(x) ES} is convex

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