bonjour
f ( 2) = 0 et f ( 0 ) = 4
( 4 - 0 ) : ( 0 - 2 ) = - 4/2 = - 2
ax = - 2 x
f ( 2 ) = 0
2* - 2 + b = 0
b = - 4
f (x) = - 2 x - 4
g (0) = - 1 et g ( 3) = 1
( 1 + 1 ) : ( 3 - 0 ) = 2 /3
ax = 2 x /3
g (0) = - 1
0 * 2/3 + b = - 1
b = - 1
g (x) = 2 x /3 - 1
h ( 0 ) = - 3 et h ( 3 ) = 0
( 0 + 3 ) : ( 3 - 0 ) = 3 /3 = 1
ax = x
h ( 0) = - 3
0 * 1 + b = - 3
b = - 3
h (x) = x - 3
