bonjour
f (x) = 5 / 9 x - 2
domaine de def = R \ 2/9
g (x) = - x² + 3 x - 1
g ( - 5 ) = - ( - 5 )² + 3 *-5 - 1 = - 25 - 15 - 1 = - 41
h (x) = ( 2 x - 3 ) ( x + 1 )
h ( x) = 0
x = 3/2 et - 1
k (x) = x² - x /3 + 1
k ( - 2 ) = ( - 2 )² - ( - 2 /3 ) + 1 = 4 + 2/3 + 1 = 12/3 + 2/3 + 3/3 = 17/3 donc oui
