Răspuns:
Explicație pas cu pas:
(7/9*(7/9)^4)^3 = ((7/9)^5)^3= (7/9)^15
1- (7/9)^17 :(7/9)^15 = 1 -(7/9)^2 =
1 - 49/81 = (81-49)/81 = 32/81
