\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Consider the function defined as \(\Fonction{f}{\mathbb{R}}{\mathbb{R}}{x}{x^2 + 1}\).
  1. What is the domain of \(f\)?
  2. What is the codomain of \(f\)?
  3. What is the image of \(x=-3\)?
  4. What are the preimage(s) of \(y=5\)?

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