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jiji5
@jiji5
January 2021
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svpp si vous pouvez m aider :)
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laurance
-7<3b-1<2 ⇒ -6 < 3b< 3 ⇒ -2<b< 1
1/4<a<1 ⇒ 1 <4a < 4
-2<b< 1 ⇒ -1<-b<2 ⇒ 0 < 4a-b< 6
1/4<a<1 ⇒ 1/16<a²< 1
-2<b< 1 ⇒ -2<b< 0 ou 0<b<1 ⇒ 0< b² <4
1 <4a < 4 ⇒ 1/4<1/(4a)<1 ⇒ -1<-1/(4a)< -1/4 ⇒ -2<-2/(4a) < -2/4
-2<b<1 ⇒ -2/(4a) < b/(4a) < 1(/4a)
d'où
-2< -2/(4a) < b/(4a) < 1/(4a) < 1
-2 < b/(4a) < 1
1 votes
Thanks 1
jiji5
je vous remercie sinon vous pouvez jeter un coup d œil sur mes autre exercices svp
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jiji5
January 2021 | 0 Respostas
svpppo c est juste un ptit exercice plss help
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jiji5
January 2021 | 0 Respostas
Je veux juste savoir est ce que c est juste ! c est sur la comparaison dans IR
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jiji5
January 2021 | 0 Respostas
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jiji5
January 2021 | 0 Respostas
svp c est un exercice sur la comparaison dans IR plzz
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jiji5
January 2021 | 0 Respostas
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jiji5
January 2021 | 0 Respostas
svp j ai besoin d aide ( c est urgent ) :)
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jiji5
January 2021 | 0 Respostas
plsss heeeelp svp aidez moi ! :(
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jiji5
January 2021 | 0 Respostas
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jiji5
January 2021 | 0 Respostas
heelp :( ps : tt en bas le deniers nombre c est 29/4
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jiji5
January 2021 | 0 Respostas
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Lista de comentários
1/4<a<1 ⇒ 1 <4a < 4
-2<b< 1 ⇒ -1<-b<2 ⇒ 0 < 4a-b< 6
1/4<a<1 ⇒ 1/16<a²< 1
-2<b< 1 ⇒ -2<b< 0 ou 0<b<1 ⇒ 0< b² <4
1 <4a < 4 ⇒ 1/4<1/(4a)<1 ⇒ -1<-1/(4a)< -1/4 ⇒ -2<-2/(4a) < -2/4
-2<b<1 ⇒ -2/(4a) < b/(4a) < 1(/4a)
d'où
-2< -2/(4a) < b/(4a) < 1/(4a) < 1
-2 < b/(4a) < 1