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Dodoetteodoette
@Dodoetteodoette
April 2019
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Bonjours, j'ai un DM de maths niveau 3ème mais je n'y arrive pas, je pourrais avoir de l'aide svp ?!
Ex 2
:
On considère la fonction f(x) = -2x.
1) Détermine f(3).
2) Détermine le nombre dont l'image est -8.
3) Détermine l'image de -3.
4) Détermine x tel que f(x) = -6.
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Omnes
Salut
On a f(x) = -2x
1)
f(3) = -2 * 3 = -6
2)
f(x) = -8
-2x = -8
x = -8/-2 = 4
3)
f(-3) = = -2 * (-3) = 6
4)
f(x) = -6
-2x = -6
x = -6/-2 = 3
2 votes
Thanks 1
dodoetteodoette
Merci beaucoup
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Lista de comentários
On a f(x) = -2x
1)
f(3) = -2 * 3 = -6
2)
f(x) = -8
-2x = -8
x = -8/-2 = 4
3)
f(-3) = = -2 * (-3) = 6
4)
f(x) = -6
-2x = -6
x = -6/-2 = 3