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6) ²log3-²log 6+²log 8 = ²(3:6.8)=²log 4 =2
8) a log x =3 ----------------- x= a pangkat 3
3a log y= 3-------------------y=3a pangkat 3
y/x =3a pangkat 3/ a pangkat 3 =27
7) ²log 3 = x dan ³ log 5 =y
⁴ log 15 =
=2log1/2x8
=2log4
=2x2log2
=2x1
=2
9).8log32+8log16-8log128=8log32x16/128
=8log512/128
=8log4
=1/2