hello besoin d aide....comprendre les notations 1..a.5*   b(-5)*   c5-*   d(-5)-*     tout des puissances 3.......

Bonjour,

[tex]a)\ 5^3=5\times5\times5\Longleftrightarrow \boxed{5^3=125}\\\\b)\ (-5)^3=(-5)\times(-5)\times(-5)\Longleftrightarrow \boxed{(-5)^3=-125}\\\\c)\ 5^{-3}=\dfrac{1}{5^3}\Longleftrightarrow \boxed{5^{-3}=\dfrac{1}{125}}\\\\d)\ (-5)^{-3}=\dfrac{1}{(-5)^3}\Longleftrightarrow (-5)^{-3}=\dfrac{1}{-125}\Longleftrightarrow \boxed{(-5)^{-3}=\dfrac{-1}{125}}[/tex]

5³ = 5 * 5 * 5 = 125

(- 5)³ = -5 * (- 5) * (- 5) = - 125

5⁻³ = 1/5³ = 1/125

(- 5)⁻³ = 1/(- 5)³ = 1/- 125 = - 1/125