Bonsoir pouvez-vous me dire si s'est juste,merci.
Exercice 1: (dériver)
1)(x) = x ¹²
f ' (x) = 12 x ¹¹
2)f (x) = 4 x ³ - 2 x² + x - 12
f ' ( x) = 12 x² - 4 x + 1
3)f (x) = 2/3 x ³ + 1 /2 x - 3/4
f ' (x) = 2 x² + 1/2
4)f (x) = - 4 x - 12 / x
f ' (x ) = - 4 - 12/x²
5)f (x) = ( x² + 2) / x
f ' (x) = - 2 x / x²
Exercice 2 :
f'(-1) = -4'
f'(2) = -1
Exercice 3 :
1) f'(0) = -3
f'(3) = 0
2) f'(x) ≤ 0
> x ∈ ]-∞ ; 3]