Etude d'une fonction de degré 3
Quiz
•
Mathematics
•
6th Grade
•
Practice Problem
•
Hard
frédéric Lecocq
Used 10+ times
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13 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Soit f(x) = 0,2x3+1,3x²+0,8x-2,8 sur [-8 ;2]. La dérivée de f est :
f'(x) = 0,6x²+2,3x-0,8
f'(x) = 0,2x²+2,3x-0,8
f'(x) = 0,6x²+2,3x+0,8
f(x) = 0,6x²+2,3x+0,8
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Soit f(x) = 0,2x3+1,3x²+0,8x-2,8 sur [-8 ;2], la dérivée de cette fonction f est une fonction de degré
1
2
3
autre
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pour résoudre une équation second degré égal à zéro :
On met les x d'un coté et les nombres de l'autre
On fait un produit en croix
On utilise Δ, on regarde le signe et on troue les solutions si il y en a
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soit f(x) = 0,2x3+1,3x²+0,8x-2,8 sur [-8 ;2]
Résoudre f'(x ) = 0 consiste à résoudre 0,6x²+2,6x+0,8 = 0
Vrai
Faux
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pour l'équation 0,6x²+2,6x+0,8 = 0
a= 0,6; b = 2,6 ;c = 0,8
a= 0,6; b = - 2,6 ;c = 0,8
a= 1,2; b = 2,6 ;c = 0,8
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pour l'équation 0,6x²+2,6x+0,8 = 0
Δ = 16
Δ = 4,84
Δ = 25
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Δ est positif alors
il n'a pas de solution
Il y a une solution double
Il y a deux solutions
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