Matematika Sukino Kelas X
Bab 2 : Fungsi, Persamaan, dan Pertidaksamaan Logaritma
LKS 3
A.
7. Jika 2√2log 9 = k, maka 27log 4 = ....
a. k/2
b. 8k/9
c. 1/2k
d. 8/9k
e. 9/8k
Jawaban : D
2√2log 9 = k
2 . 2^1/2 log 32 = k
2^3/2 log 32 = k
2 / (3/2) . 2 log 3 = k
2 . 2/3 . 2log 3 = k
4/3 . 2log 3 = k
2log 3 = k/(4/3)
2log 3 = 3k/4
27log 4
= 3^3log 22
= 2/3 3log 2
= 2/3 . 1/2log 3
= 2/3 . 1/(3k/4)
= 2/3 . 4/3k
= 8/9k
> soal no 8
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