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malikael
@malikael
June 2021
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Resoudre l'inéquation :
(2x + 5)(1-x)<0
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isapaul
Verified answer
Bonsoir
(2x + 5)(1 - x ) < 0
sachant que
2x + 5 < 0 pour x < -5/2
1 - x < 0 pour x > 1
Le plus simple est de mettre sous forme d'un tableau
x - oo -5/2 1 +oo
(2x+5) négatif 0 positif positif
(1-x) positif positif 0 négatif
f(x) négatif 0 positif 0 négatif
Bonne soirée
0 votes
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Verified answer
Bonsoir(2x + 5)(1 - x ) < 0
sachant que
2x + 5 < 0 pour x < -5/2
1 - x < 0 pour x > 1
Le plus simple est de mettre sous forme d'un tableau
x - oo -5/2 1 +oo
(2x+5) négatif 0 positif positif
(1-x) positif positif 0 négatif
f(x) négatif 0 positif 0 négatif
Bonne soirée