3-cm7 2013-2014
TRANSCRIPT
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Calcul mental Fonctions
et calcul littéral n°7
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Diapositive 1Diapositive 1
Calculer l’image de 3 par Calculer l’image de 3 par la fonction f.la fonction f.
f(x)=x² x− 5
−
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Diapositive 2Diapositive 2
Réduire si possible :Réduire si possible :
x x−2 5
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Diapositive 3Diapositive 3
Réduire si possible :Réduire si possible :
x² x×-4 5
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Diapositive 4Diapositive 4 1g(x)=
xCalculer l’image de 10 Calculer l’image de 10 par la fonction g.par la fonction g.
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Diapositive 5Diapositive 5
x -3 -1 6 3
F(x) 10 12 8 6
Donner l’antécédent de Donner l’antécédent de 6 par la fonction F.6 par la fonction F.
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FIN
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CORRECTION
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Diapositive 1Diapositive 1
−
f(3)=3² − ×= − = −
5 39 15 6
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Diapositive 2Diapositive 2
x x= x−2 5 - 3
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Diapositive 3Diapositive 3
3x² x= x× -- 204 5
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Diapositive 4Diapositive 4
1
1g(
010)= = 0,1
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Diapositive 5Diapositive 5
x -3 -1 6 3
F(x) 10 12 8 6
L’antécédent de 6 par la L’antécédent de 6 par la fonction F est fonction F est 33..