Jika ²log3=a dan ³log5=b maka, 15log20=...?
Matematika
Marshelavrnc
Pertanyaan
Jika ²log3=a dan ³log5=b maka, 15log20=...?
1 Jawaban
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1. Jawaban erlyciatripurwanti
15 log 20=³log 20/³log 15
=³log(2².5)/³log(3.5)
=³log 2²+³log 5/³log 3+³log 5
=2.³log 2+³log5/³log3+³log 5
=2.1/a+b/1+b
=2+ab/a+ab