³log 1/2+3log10-3log45=...

*logaritma
ingat dengan sifat2nya ya
>alog(bd)= alogb + alogd
>alog(b/d)= alogb - alogd

³log1/2 + ³log10 - ³log 45=
=³log(1/2·10) - ³log45
=³log5 - ³log45
=³log(5/45)
=³log(1/9)
=³log(1/3²)
=³log3^-2
= -2 · ³log3
= -2 · 1
= -2

3log 1/2 × 10 :45 = 3log 5/45
= 3log 1/9
= 3log (3)^-2
= -2