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April 2019
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Exercice maths:
Resoudre dans R les inéquations suivantes:
(x-3)(2x-5)>0
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Exercice maths:
Résoudre dans R les inéquations suivantes:
(x-3)(2x-5)>0
Tableau de signes
x |-inf 2,5 3 +inf |
-------------------------------------------------------------------
x-3 | - - 0 + |
-------------------------------------------------------------------
2x-5 | - 0 + + |
------------------------------------------------------------------
f(x) | + 0 - 0 + |
------------------------------------------------------------------
donc
S=]-inf;2,5[ U ]3;+inf[
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Résoudre dans R les inéquations suivantes:
(x-3)(2x-5)>0
Tableau de signes
x |-inf 2,5 3 +inf |
-------------------------------------------------------------------
x-3 | - - 0 + |
-------------------------------------------------------------------
2x-5 | - 0 + + |
------------------------------------------------------------------
f(x) | + 0 - 0 + |
------------------------------------------------------------------
donc S=]-inf;2,5[ U ]3;+inf[