bonjour
A ( 3) = - 3 et B ( - 5 ) = 2
( 2 + 3 ) / ( - 5 - 3 ) = - 5/8
donc ax = - 5 x / 8
A ( 3) = - 3
3 * - 5 / 8 + b = - 3
- 15/8 + b = - 3
b = - 3 + 15/8 = - 24/8 + 15 /8 = - 9/8
f (x) = - 5 x /8 - 9 /8
B ( - 5) = - 5 * - 5/8 - 9/8 = 25/8 - 9/8 = 16/8 = 2
