Question: Given quantity demanded D=f(P+T), quantity supplied S=g(P), where P is price and T is consumption tax. At equilibrium, we have D=S, i.e. f(P+T)=g(P). Suppose this

Given quantity demanded D=f(P+T), quantity supplied S=g(P), where P is price and T is consumption tax. At equilibrium, we have D=S, i.e. f(P+T)=g(P). Suppose this equilibrium equation defines a function P(T). Show that dTdP=PfPgf/T
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