Question: The elasticity of a function f: is defined to be In general, the elasticity varies with x. Show that the elasticity of a function is

The elasticity of a function f: „œ †’ „œ is defined to be

In general, the elasticity varies with x. Show that the elasticity of a function is constant if and only if it is a power function, that is,
f (x) = Axa

E(x) f(x)

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