Réponse:
1) f(10)= 5/(4×10) = 1/8 soit 0.125
2)
[tex] \frac{5}{4x} = - 10 \\ \frac{1}{4x} = - 50 \\ 4x = \frac{1}{ - 50} \\ x = - \frac{4}{50} \\ x = - 0.08[/tex]
1) f(x)= 3x
2) f(-5)= -15
f(4)=12 f(19/3)= 19
3) 3x= -6 vaut x=-2
3x=24 vaut x=8
3x=4.8 vaut x=1.6