Sagot :
Réponse :
Bonjour exercice 7 :
1) fonction: 12.3 + 0.54 x
2) si sa dépense est de 17.16
on a donc 12.3 + 0.54 x = 17.16
0.54 x = 17.16 -12.3
0.54 x= 4.86
x = 4.86 / 0.54 donc x = 9
Voilà
bonjour,
1. f (x) = 12.3 + 0.54 x
2 . 12.3 + 0.54 x = 17.16
0.54 x = 17.16 - 12.3
0.54 x = 4.86
x = 9
il a 9 timbres
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f ( - 4) = 2
1 . f (x ) = - 2/4 = - 1/2 x
2. f ( - 9) = - 9 * - 1/2 = 9 /2 = 4.5
3. - x /2 = 8
- x = 16
x = - 16