Répondre :
a)
f(1) = 1- 6 = -5
f(2) = 1-6/2 = 1-3 = -2
f(3) = 1-6/3 = 1-2 = -1
f(4) = 1-6/4 = -2/4 = -1/2
f(5) = 1-6/5 = -1/5
b)
f(-1) = -1 + 1 = 0
f(0) = 0
f(1) = 2
f(2) = 2 + 4 = 6
f(3) = 3 + 9 = 12
f(4) = 4 + 16 = 20
c)
f(-1) = 3 + 5 = 8
f(0) = 3
f(1) = -2
f(2) = 3-10 = -7
f(3) = 3-15 = -12
f(4) = 3 - 20 = -17
f(5) = 3 - 25 = -22
f(6) = 3 - 30 = -27
f(7) = 3 - 35 = -32
En espérant t'avoir aidé.