The set of points of differentiability of the function \( f(x)=e^{-...

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The set of points of differentiability of the function \( f(x)=e^{-|x|} \) is
(a) \( (0, \infty) \)
(b) \( (-\infty, \infty) \)
(c) \( [0, \infty) \)
(d) \( (-\infty, \infty) \sim\{0\} \)
\( \mathrm{W} \)
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