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Floochedu11
@Floochedu11
April 2019
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Exercice de maths . 1 ère S URGENT SVP !
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Commentaires (2)
(m-1)x²-4m x+4m-1=0
delta=16m²-4(m-1)(4m-1)
=16m²-4(4m²-5m+1)
=16m²-16m²+20m-4
=4(5m-1)
si m=1/5 alors delta=0
donc il y a 1 seule solution
si m>1/2 alors delta>0
donc il y a 2 solutions
1 votes
Thanks 1
Floochedu11
pourquoi m>1/2 ?
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delta=16m²-4(m-1)(4m-1)
=16m²-4(4m²-5m+1)
=16m²-16m²+20m-4
=4(5m-1)
si m=1/5 alors delta=0
donc il y a 1 seule solution
si m>1/2 alors delta>0
donc il y a 2 solutions