Explications étape par étape
f(6) = 5
f(6) = 6a
6a = 5
a = 5/6
f(x) = 5/6 x
g(-4) = 8/7
g(-4) = - 4a
- 4a = 8/7
a = 8/7 / ( - 4 ) = 8/7 × ( - 1/4 ) = - 8/28 = - 2/7
g(x) = - 2/7 x
h(2/3) = 5
h(2/3) = 2/3 a
2/3 a = 5
a = 5 / 2/3 = 5 × 3/2 = 15/2 = 7,5
h(x) = 7,5x
