Réponse :
Explications étape par étape :
Bonjour
A = (x⁷)² / x¹⁵
A = x¹⁴/x¹⁵
A = x¹⁴⁻¹⁵
A = x⁻¹
B = (x⁻⁵) × x³ /x⁻¹²
B = x⁻⁵⁺³/x⁻¹²
B= x⁻²/x⁻¹²
B = x⁻²⁻⁽⁻¹²⁾
B = x⁻²⁺¹²
B = x¹⁰
C = x × x³ /(x²/x)
C = x¹⁺³/ x
C = x⁴⁻¹
C = x³
D = 1/(x⁻⁷ × x³ )
D = 1/ x⁻⁷⁺³
D = 1 /x⁻⁴
D = x⁴
exo 79
A = xⁿ⁺³ /(xⁿ)³
A = xⁿ⁺³/x³ⁿ
A = xⁿ⁺³⁻³ⁿ
A = x⁻²ⁿ⁺³
B = (x² × x⁵ⁿ)/ (x²ⁿ × x)
B = x²⁻⁵ⁿ/ x²ⁿ⁺¹
B = x²⁻⁵ⁿ⁻²ⁿ⁻¹
B = x¹⁻⁷ⁿ
