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Let f(x) be difined in the interval [-2...

Let f(x) be difined in the interval [-2, 2] such that
`f(x)={{:(-1", " -2lexle0),(x-1", " 0ltxle2):}`
and `g(x)=f(|x|)+|f(x)|`.
Test the differentiability of g (x) in (-2, 2).

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