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Soit la fonction f(x)=\frac{2x+7}{x^2-x-2} . Laquelle des propositions ci-...

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Soit la fonction $f(x)=\frac{2x+7}{x^2-x-2}$ f(x)=\frac{2x+7}{x^2-x-2} .

Laquelle des propositions ci-dessous est-elle correcte ?

Dom(f)=[-2,1]

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$Dom(f)=\mathbb{R}\setminus \{-1,2\}$ Dom(f)=\mathbb{R}\setminus \{-1,2\}

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Dom(f)=[-1,2]

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$Dom(f)=\mathbb{R}\setminus \{-2,1\}$ Dom(f)=\mathbb{R}\setminus \{-2,1\}

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Aucune des autres propositions n'est correcte

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