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2014-03-16T13:04:48+01:00
Pour le 26
A 12
B -21
C 1
D -15/12
  • Utilisateur Brainly
2014-03-16T13:06:34+01:00
Exercice 26:

Soit f(x) = 3x

a) f(4) = 3*4 = 12

b) f(-7) = 3*(-7) = -21

c) f(1/3) = 3 *1/3 = 1

d) f(-5/12) = 3 * (-5/12) = -15/12= -5/4

Exercice 27:

Soit g(x) = -2x

a)
g(x) =14
-2x = 14
x = -14/2
x= -7

b)
g(x) = -86
-2x = -86
x = 86/2
x = 43

c)
g(x) = -25
-2x = -25
x = -25/2

d)
g(x) = -17/2
-2x = -17/2
x = -17/4

Voilà ! J'espère t'avoir aidé(e) ! :)