Question: Let g : R -> R be a function given by g(x) = f1(x) + f2(x). H (a) Show that if each fi is concave,

Let g : R" -> R be a function given by

Let g : R" -> R be a function given by g(x) = f1(x) + f2(x). H (a) Show that if each fi is concave, then g is also concave. (b) Provide an example of two functions f1(x) and f2(x) such that each fi is quasiconcave, but g is not quasiconcave

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