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Ines10022
@Ines10022
May 2019
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Bonjour. J'ai besoin de votre aide.
Soit la fonction f( x ) = (4x-2).
1. Calculer les images des nombres a. -1,2 b. 6
2. Calculer l'antécédent de 3,12
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MAHAM
Verified answer
Bonsoir
f(x)=4x-2
1) f(-1.2)=4(-1.2)-2
=-6.8
f(6)=4(6)-2
=22
2) f(x)=3,12⇔4x-2=3.12
⇔4x=5.12
⇔x=1.28
1 votes
Thanks 1
MAHAM
ce symbole signifie équivalent
MAHAM
ce symbole ⇔ signifie équivalent
MAHAM
pas de quoi
loulakar
Verified answer
Bonjour,
1) images des nombres :
f(x) = (4x - 2)
a) -1,2 :
f(-1,2) = 4 * (-1,2) - 2 = (-4,8) - 2 = (-6,8)
b) 6 :
f(6) = 4 * 6 - 2 = 24 - 2 = 22
2) antécédents de 3,12 :
f(x) = 3,12
4x - 2 = 3,12
4x = 3,12 + 2
4x = 5,12
x = 5,12 / 4
x = 1,28
0 votes
Thanks 1
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Bonjour, pourriez-vous m'aider? Je n'y arrive pas. Merci d'avance
Responda
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Lista de comentários
Verified answer
Bonsoirf(x)=4x-2
1) f(-1.2)=4(-1.2)-2
=-6.8
f(6)=4(6)-2
=22
2) f(x)=3,12⇔4x-2=3.12
⇔4x=5.12
⇔x=1.28
Verified answer
Bonjour,1) images des nombres :
f(x) = (4x - 2)
a) -1,2 :
f(-1,2) = 4 * (-1,2) - 2 = (-4,8) - 2 = (-6,8)
b) 6 :
f(6) = 4 * 6 - 2 = 24 - 2 = 22
2) antécédents de 3,12 :
f(x) = 3,12
4x - 2 = 3,12
4x = 3,12 + 2
4x = 5,12
x = 5,12 / 4
x = 1,28