1.)5log250-5log6+5log12-5log20 =?

1.)5log250-5log6+5log12-5log20 =?
JAWAB
5log250 – 5log6 + 5log12 – 5log20
= 5log250 – 5log20 + 5log12 – 5log6
= 5log(250/20) + 5log(12/6)
= 5log(12,5) + 5log2
= 5log (12,5×2)
= 5log25
= 2

2.) 2. 3log4- 1/2 .3log25+3log10-3log32 =?
JAWAB
2. 3log4 – 1/2 .3log25 + 3log10 – 3log32
= 3log4² – 3log√25 + 3log10 – 3log32
= 3log16 – 3log5 + 3log10 – 3log32
= 3log16 – 3log32 + 3log10 – 3log5
= 3log(16/32) + 3log(10/5)
= 3log0,5 + 3log2
= 3log(0,5×2)
= 3log1
= 0

3.) 2/3. 2log8- 3/2 2log16 + 1/2 2log5 =?
JAWAB
2/3.2log8- 3/2 2log16 + 1/2 2log5
= 2log8^⅔ – 2log16^3/2 + 2log5^½
= 2log2² – 2log4³ + 2log√5
= 2 – 6 + 2log√5
= 2log√5 – 4

NB: No 3 angkanya gak bagus. 🙂

1. 5log(250:6×12:20)=5 log 25=5
2 .3log4^2- 3log25^1/2+3log10-3log32=3log16-3log5+3log10-3log2=
    =3log(16:5×10:2)=3log16
3. 2log8^2/3-2log16^3/2+2log5^1/2= 2log∛8² – 2log√16³ +2log5^1/2=
     1/2 × 2log4-2log64+2log5=1/2×2-6+2log5=-6+2log5
 susah juga nyarinya….:) jawaban terbaik yach…..^_^