Question

Tentukan nilai logaritma berikut ini !
1. √(3)×log 81 =
2. 7×log 49 √(7) =
3. 1/2×log 32 =
4. √(5)×log √(125) =

Answer 1

1) √3'log 81 = (3^1/2)'log 3^4 = 4 :1/2 = 8
2) 7'log 7^2.7^1/2 =7'log 7^(5/2) = 5/3
3) (1/2)'log 32 = (1/2)'log 2^5 = 5: 1/2 = 10
4) (5^1/2)'log 125^1/2 = (5^1/2)'log 5^(3/2) = 3/2 : 1/2 = 3