bonjour

tu calcules  2 images

f (x) = 3 x

f (0) = 0

f ( 2 ) = 6

g (x) = - x

g ( 0 ) = 0

g ( 3 )  = - 3

h (x) = 1.5 x

h (0) = 0

h ( 1 ) = 1.5

k (x) = - 2 x  /3

k ( 0) =  0

k  ( 3 ) = - 6 /3 = - 2

f ( 1) =  3

g ( 1) = -  1

h ( 1 ) =  1.5

k ( 1) = -   2 /3