Let be a real-valued function defined by

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Let ff be a real-valued function defined by f(x)=ex−e−∣x∣ex+e∣x∣f(x)=\frac{e^x-e^{-|x|}}{e^x+e^{|x|}}. Then the range of f(x)f(x) is: (a) R\mathbb{R} (b) [0,1][0,1] (c) [0,1)[0,1) (d) [0,12)\left[0,\frac{1}{2}\right)

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