Réponse:
[tex]1) \: f(x) = 2(x + 7) - 14[/tex]
[tex]2) \: f(3) = 2(3 + 7) - 14 = (6 + 14) - 14 = 20 - 14 = 6[/tex]
[tex]f( - 5) = 2( - 5 + 7) - 14 = ( - 10 + 14) - 14 = 4 - 14 = - 10[/tex]
[tex] \frac{3}{2} = 1.5[/tex]
[tex]f(1.5) = 2(1.5 + 7) - 14 = (3 + 14) - 14 = 17 - 14 = 3[/tex]
[tex]3 = \frac{6}{2} [/tex]
[tex]3) \: jsp[/tex]
[tex]4) \: f(x) = 2x[/tex]
