4)) 343 = 7^3
log(343) (49) = log(7^3) (7^2) = 2*(1/3)log(7)(7) = 2/3
log(2/3) (2/3) = 1
V81 = 9
log(3)(9) = 2
log(4)(2) = 1/2
Ответ: 1.5
6)) log(V7)(49) = log(7^(1/2)) (7^2) = 2*2*log(7)(7) = 4
(log(2)(4))^2 = 2^2 = 4
log(2)(32) = 5
((log(1/5)(5))^3 = -1
Ответ: -4