Which one of the following is not bounded on the intervals as indicated
Which one of the following is not bounded on the intervals as indicated
- A
$f(x) =$ ${2^{\frac{1}{{x - 1}}}}$ on $(0, 1)$
- B
$g(x) = x cos \frac{1}{x} $ on $(-\infty ,\infty )$
- C
$h(x) = xe^{-x} $ on $(0, \infty )$
- D
$l (x) =tan^{-1} 2^x $ on $ (-\infty , \infty )$
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