bonjour
f (x) = x² + 1.5
tu calcules 2 images pour tracer la courbe
f ( 0) = 1.5
f ( 2) = 4 + 1.5 = 5.5
g (x) = x² - 1
g ( 0) = - 1
g ( 2) = 4 - 1 = 3
f (x) = 0.5 x²
f ( 2 ) = 0.5 * 4 = 2
f ( - 3 ) = 0.5 * ( - 3 )² = 4.5
g (x) = - 3 x²
g ( 0 ) = 0
g ( 2) = - 3 * 4 = - 12
