Réponse :
1) f(1)= -2
2) f(x)= -2x
3)a g(2)= 2a + 4
g(2)= 1
Donc 2a+4= 1
2a=-3
a=-3/2
g(x)=-3/2 + 4
3)b
-3/2x +4 =-2
-3/2x= 2
x= 2*2/-3
x=-4/3
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Réponse :
1) f(1)= -2
2) f(x)= -2x
3)a g(2)= 2a + 4
g(2)= 1
Donc 2a+4= 1
2a=-3
a=-3/2
g(x)=-3/2 + 4
3)b
-3/2x +4 =-2
-3/2x= 2
x= 2*2/-3
x=-4/3