1) = log(6) 2·3 = log(6) 6 =1
2) = log(2) 3·4/3 = log(2) 2² = 2
3) = log(3) 7/(7/27) = log(3) 27 = 3
4) = lg (40·25) = lg 1000 = 3
5) = lg 0,18/180 = lg 0,001 = 0,1
6) = log(12) (4·36) = log(12) 12² = 2
7) = log(5) (100/4) 2
8) = log(6) 4·9 = log(6) 6² = 2
9) = log(6) [(1/18)·(1/12)] = log(6) [1/6³] = log(6) 6^(-3) = -3
10) = log(0,1) 50/0,5 = log(0,1) 100 = log(1/10) (1/10)^(-2) = -2