Réponse :
Bonjour
2) a) g(x) = (x⁴ + x)/(4x + 8)
g'(x) = [(4x³ + 1)(4x + 8) - 4(x⁴ + x)]/(4x + 8)²
g'(x) = (4x⁴ + 32x³ + 4x + 8 - 4x⁴ - 4x)/(4x + 8)²
g'(x) = (32x³ + 8)/(4x + 8)²
g'(x) = 8(4x³ + 1)/(4x + 8)²
b) g(x) = 1/(x² + 2)
g'(x) = -2x/(x² + 2)²
