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Anaisouchard
@Anaisouchard
April 2019
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Pleaaaaaaaaaaaase très important je comprends pas !!!
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mohhaa30
Verified answer
Salut , alors
1)
P1=f(x)=7,5x
P2=f(x)=5,25x+27
2)
a)
7,5x< 5,25x + 27
7,5x - 5,25x < 5,25x - 5,25x +27
2,25x<27
x<27/2,25
x<12
b) cette innequation nous montre a partir de combien de place le tarif B est plus chere que le tarif A
voila =)
0 votes
Thanks 1
xxx102
Bonsoir,
1)
Tarif 1 : 7,50€ la place, soit P1 = 7,5x.
Tarif 2 : 5,25€ la place, plus 27€ soit P2 = 5,25x+27
1)
a)
Il faut commencer par passer les x à gauche...
Ensuite on divise par 2,25. Comme c'est un nombre positif, on garde le sens (sinon on l'aurait changé).
b)Cela revient à écrire P1 < P2.
En fait, le tarif P1 est plus avantageux quand x est strictement inférieur à 12.
Si tu as des questions, n'hésite pas ! =)
1 votes
Thanks 1
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Verified answer
Salut , alors1)
P1=f(x)=7,5x
P2=f(x)=5,25x+27
2)
a)
7,5x< 5,25x + 27
7,5x - 5,25x < 5,25x - 5,25x +27
2,25x<27
x<27/2,25
x<12
b) cette innequation nous montre a partir de combien de place le tarif B est plus chere que le tarif A
voila =)
1)
Tarif 1 : 7,50€ la place, soit P1 = 7,5x.
Tarif 2 : 5,25€ la place, plus 27€ soit P2 = 5,25x+27
1)
a)
Il faut commencer par passer les x à gauche...
Ensuite on divise par 2,25. Comme c'est un nombre positif, on garde le sens (sinon on l'aurait changé).
b)Cela revient à écrire P1 < P2.
En fait, le tarif P1 est plus avantageux quand x est strictement inférieur à 12.
Si tu as des questions, n'hésite pas ! =)