Jawabanmu

2014-09-05T09:27:34+07:00
2 log 3 = a dan 3 log 5 = b maka a x b = 2 log 5 
maka 18 log 50 = 18 log 5 + 18 log 10
= 9 x 2 log 5 + 18
= 9a + 18
2014-09-05T09:29:28+07:00
2 log 50 / 2 log 18 = 2 log 25.2 / 2 log 9x2
= 2log 25+2 log 2/2log9+2log 2
= 2log 5 pangkat 2 + 1  /  2 log 3 pangkat 2 + 1
= 2. 2 log 5 + 1 / 2. 2log 3 + 1
=2. (2log 3 . 3log 5) + 1 /  2. a +1
=2 ab + 1 / 2a+1
3 1 3