log_3[log_4(log_5(a))] = 0 (1)
log_4[log_3(log_5(b))] = 0 (2)
(1) => log_4(log_5(a)) = 1
=> log_5(a) = 4
=> a = 5^4
(2) => log_3(log_5(b)) = 1
=> log_5(b) = 3
=> b = 5^3
所以,a/b = 5
式中,log_5(a)表示以5为底的对数,5^3表示5 的三次方