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$$\begin{align*} f(x) &= \frac{2}{x+1}, \\ g(x) &= \cos x, \\ h(x) &= \sqrt{x+3} \end{align*} $$ Find the range of $f(g(h(x)))$.

Please explain the problem.

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    Just to make sure.. You should review the concepts of [domain](http://en.wikipedia.org/wiki/Domain_of_a_function) and [range](http://en.wikipedia.org/wiki/Range_(mathematics)) of a function.2012-05-14

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