3 The function \(g\) is defined by $$g ( x ) = \operatorname { sech } x \quad ( x \in \mathbb { R } )$$ Which one of the following is the range of \(g\) ?
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\(- \infty < \mathrm { g } ( x ) \leq - 1\)
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\(- 1 \leq \mathrm { g } ( x ) < 0\)
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\(0 < \mathrm { g } ( x ) \leq 1\)
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\(1 \leq g ( x ) \leq \infty\) □