👤

Efectuati ,dand factor comun ( 7^10 -7^9) : (7^9 -7 ^8)

Răspuns :

(7¹⁰-7⁹):(7⁹-7⁸)=[7⁹(7-1)]:[7⁸(7-1)]=(7⁹*6):(7⁸*6)=7*1=7