bonsoir
h (x) = 5 x /2 - 3
h ( 4) = 20/2 - 3 = 7 donc ordonnée = 7
5 x /2 - 3 = 2
5 x /2 = 4/2 + 6/2
5 x = 10
x = 2
donc abscisse = 2
f (x) = ( 3 x - 5 ) / ( x² + 1 )
F (2) = ( 6 - 5 ) / ( 4 + 1 ) = 1 /5 = 0.2 donc D ∈ C
p (x) = - 2 x² + 5 x + 4
p ( - 1 ) = - 2 ( - 1 )² + 5 * - 1 + 4 = - 2 - 5 + 4 = - 3 donc E ∉ C
