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April 2019
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Resoudre inequation 2x-1/x-5 >=0 a l,aide de tableau de signe
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Commentaires (2)
(2x - 1)/(x - 5) ≥ 0
2x - 1 = 0 x - 5 = 0
2x = 1 x = 5
x = 1/2
NOTE : 5 est la valeur interdite (celle qui annule le dénominateur)
x - ∞ 1/2 5 + ∞
2x - 1 - 0 + +
x - 5 - - 0 +
(2x - 1)/(x - 5) + 0 - || +
S= ] - ∞ ; 1/2] U ] 5 ; + ∞ [
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2x - 1 = 0 x - 5 = 0
2x = 1 x = 5
x = 1/2
NOTE : 5 est la valeur interdite (celle qui annule le dénominateur)
x - ∞ 1/2 5 + ∞
2x - 1 - 0 + +
x - 5 - - 0 +
(2x - 1)/(x - 5) + 0 - || +
S= ] - ∞ ; 1/2] U ] 5 ; + ∞ [