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shannab
@shannab
January 2021
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Bonjour, voila des inéquation à résoudre :
a) -2x*(x-1)*(4-x) b) x au carré*(4-x)*(-2x+1)>0
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anylor
Bonjour
a)
-2x*(x-1)*(4-x) > 0
S= ] 0;1[ U] 4;+∞[
pour
-2x*(x-1)*(4-x) < 0
s=] -∞;0[U] 1;4[
b)
S=]-∞ ; 0[U] 0 ;1/2[U]4;+∞[
le polynôme est positif de] -∞ à 1/2[
mais il faut enlever la valeur 0
car si x= 0 le polynôme = 0
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a)
-2x*(x-1)*(4-x) > 0
S= ] 0;1[ U] 4;+∞[
pour
-2x*(x-1)*(4-x) < 0
s=] -∞;0[U] 1;4[
b)
S=]-∞ ; 0[U] 0 ;1/2[U]4;+∞[
le polynôme est positif de] -∞ à 1/2[
mais il faut enlever la valeur 0
car si x= 0 le polynôme = 0