Jika 2log3=a dan 3log5=b, maka nilai 18log75 adalahh...

18log75 adalah..
18log75 = b = 3log5

18log 75
=3log75 : 3log18
=(3log3+3log25): (3log2 +3log9)
=(1+ (3log5+3log5)) :(1/a+2)
=(1+2b) : ((1+2a)/a)
=(1+2b)(a) : (1+2a)
=(a+2ab) : (1+2a)