Let be a real valued function defined by

MATHEMATICS · Single correct · AP · AP Precalculus · Exponential and Logarithmic Functions · Exponential and Logarithmic Functions

Problem

Let

f

be a real valued function defined by

f(x)=\frac{e^x-e^{-|x|}}{e^x+e^{|x|}}

, then the range of

f(x)

is: (a)

\mathbb{R}

(b)

[0,1]

(c)

[0,1)

(d)

\left[0,\frac{1}{2}\right)