Assume that 1(x) is a function defined near a point xo and lira f (x) = 1. Prove z—Trolim f(x)2

Assume that 1(x) is a function defined near a point xo and lira f (x) = 1. Prove z—Trolim f(x)2 = 1. You may only use the precise definition of
a limit (e-S definition). You are not allowed to use limit laws