1. sederhanakan a). 3 log 49 x 7 log 4 x 16 log 9 2. Diketahui : 2 log 3 = a 3 log 5 = b Tentukan : a). 12 log 15 b). 10 log 12
Matematika
nofi04
Pertanyaan
1. sederhanakan
a). 3 log 49 x 7 log 4 x 16 log 9
2. Diketahui :
2 log 3 = a
3 log 5 = b
Tentukan :
a). 12 log 15
b). 10 log 12
a). 3 log 49 x 7 log 4 x 16 log 9
2. Diketahui :
2 log 3 = a
3 log 5 = b
Tentukan :
a). 12 log 15
b). 10 log 12
1 Jawaban
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1. Jawaban nasril7
3log49 x 7log4 x 16log9 =
(log49/log3) x (log4/log7) x (log9/log16)
= (log7^2/,log3) x (log2^2/log7) x (log3^2/log2^4)
= (2.log7/log3) x (2.log2/log7) x (2.log3/4.log2)
= 2.2.2/4 = 2