bonjour
f ( 0 ) = 0 et f ( - 2) = 5
( 5 - 0 ) / ( - 2 - 0) = - 5/2 = - 2.5
ax = - 2.5 x
f ( -2) = 5
- 2 * - 2.5 + b = 5 donc b = 5 - 5 = 0
f (x) = - 2.5 x
g ( 0 ) = 3 et g ( 1) = 5
( 5 - 3 ) / ( 1 - 0) = 2
ax = 2 x
g ( 0 ) = 3
0 * 2 + b = 3 donc b = 3
g (x) = 2 x + 3
h ( 0) = 0 et h ( 6) = 3
( 3 - 0 ) / ( 6 - 0 ) = 3 /6 = 1/2
ax = 0.5 x
h ( 0) = 0
0 * 0.5 + b = 0 donc b = 0
h (x) = 0.5 x
j ( 0) = - 1 et j ( 6) = - 3
( - 3 + 1 ) / ( 6 - 0 ) = - 2 /6 = - 1/3
ax = - x /3
j ( 0 ) = - 1
0 * - 1 + b = - 1 donc b = - 1 + 0 = - 1
j (x) = - x /3 - 1
