Bonjour, exercice 1:
1) f(1) = 1**2 -4 = 1-4 = -3
2) f(-1) = (-1)**2-4 = 1-4 = -3
3) f(-3) = (-3)**2 -4 = 9-4 = 5
f(-2) = (-2)**2 -4 = 4-4 = 0
f(3)= f(-3) et f(2)= f(-2)
Et f(0) = -4
4) x = 2.5 donc
F( 2.5 ) = (2.5)**2 -4 = 6.25-4 = 2.25
2.25#2.23 donc le point A n’appartient pas à la courbe f.
