103- If $f(x)=1-\left(\dfrac{1}{2}\right)^x$, and the domain of $y=\sqrt{x\,f(x)}$ is given, what is the range? (1) $[-1,1]$ (2) $(-\infty,0)$ (3) $(-\infty,+\infty)$ (4) $(0,+\infty)$
\textbf{103-} If $f(x)=1-\left(\dfrac{1}{2}\right)^x$, and the domain of $y=\sqrt{x\,f(x)}$ is given, what is the range?
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(1) $[-1,1]$ \hfill (2) $(-\infty,0)$ \hfill (3) $(-\infty,+\infty)$ \hfill (4) $(0,+\infty)$
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