👤

(7 la put 20 - 7 la put 9):(7 la put 9-7 la put 8)=


Răspuns :

(7²°-7⁹):(7⁹-7⁸)=7⁹(7¹¹-1):7⁸(7-1)=7⁹(7¹¹-1¹¹):7⁸(7-1)=7⁹(7-1)¹¹:7⁸(7-1)=
=7⁹⁻⁸(7-1)¹¹⁻¹=7x(7-1)¹°=7x6¹°