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seba0908
@seba0908
October 2021
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Bonjour j'ai besoin de votre aide en maths svp. Je vous remercie par avance :)
Soit f la fonction définie par f(x) = ( 4x² - 5 ) / ( x² + x + 1 ).
1°) Montrer que l'ensemble de définition de f est ℝ.
2°) Montrer que, ∀x ∈ ℝ, -6 < f(x) < 5.
On pourra pour cela étudier les deux inéquations f(x) < 5 et f(x) > -6 séparément.
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