bonjour
x
2 x
2 x + 5
h ( x) = 2 x + 5
h ( 1/3 ) = 2/3 + 5 = 2/3 + 15/3 = 15/3 = 5
2 x + 5 = 9
2 x = 9 - 4
2 x = 5
x = 5 /2
