\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
The variation table of a function \(g\) defined on \(\mathbb{R}\) is given below:
  1. Does the function \(g\) have a maximum or a minimum on \(\mathbb{R}\)? What is its value?
  2. For what value of \(x\) is this extremum reached?

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