Bonjour! J'ai un exercice très important a faire pour demain mais je ne comprend pas...Aidez moi svp!

Réponse :

Explications étape par étape

Bonsoir

(2/7)^3 = 2/7 x 2/7 x 2/7 = 8/343

(2/7)^3 = 2^3/7^3

(-2/5)^3 = (-2/5) x (-2/5) x (-2/5) = -8/125

(-2/5)^3 = (-2^3)/5^3

(-3/4)^2 = (-3/4) x (-3/4) = 9/16

(-3/4)^2 = 3^2/4^2

(-1/5)^4 = (-1/5) x (-1/5) x (-1/5) x (-1/5) = 1/625

(-1/5)^4 = 1^4/5^4

A = (-2/5)^3 x (-2/5)^2

A = -8/125 x 4/25

(-2/5)^3 x (-2/5)^2 = (-2/5)^(3+2) = (-2/5)^5