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The function f(x)=2|x|+|x+2|=||x|2|-2|x|...

The function `f(x)=2|x|+|x+2|=||x|2|-2|x||` has a local minimum or a local maximum at `x=` `-2` (b) `-2/3` (c) 2 (d) `2/3`

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