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camillepuma
@camillepuma
January 2021
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Bonjour, j'aurais besoin de l'aide en maths, svp voir ci-joint
Merci d'avance pour votre aide
C'est à rendre pour vendredi
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scoladan
Verified answer
Bonjour,
1) Df = [-1;5]
2) f(-1) = -8 f(0) = -3 et f(5) = -8
3) Quand x varie dans [-1;5], f(x) varie dans [-8;1]
4)
x -1 2 5
f(x) -8 croissante 1 décroissante -8
5)
a) f(x) = -2 2 solutions x = 0 et x = 4
b) f(x) > 0 ==> x ∈ ]1;3[
c) f(x) < -3 ==> x ∈ [-1;0[ U ]4;5]
6)
x -1 1 3 5
f(x) - 0 + 0 -
2 votes
Thanks 1
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Bonjour,URGENT! Pouvez-vous m'aider ce devoir.
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Verified answer
Bonjour,1) Df = [-1;5]
2) f(-1) = -8 f(0) = -3 et f(5) = -8
3) Quand x varie dans [-1;5], f(x) varie dans [-8;1]
4)
x -1 2 5
f(x) -8 croissante 1 décroissante -8
5)
a) f(x) = -2 2 solutions x = 0 et x = 4
b) f(x) > 0 ==> x ∈ ]1;3[
c) f(x) < -3 ==> x ∈ [-1;0[ U ]4;5]
6)
x -1 1 3 5
f(x) - 0 + 0 -