Try Out Matematika IPA 2019
Soal dan Pembahasan Try Out Matematika IPA 2019
Jawaban Try Out Matematika IPA 2019
3. Akar akar persamaan 3log2 x - 3 3log x + 2 = 3log1 yakni p dan q. Nilai dari 2(p + q) yakni ...
A. 12
B. 16
C. 18
D. 20
E. 24
Jawaban : E
misalkan a = 3log x
3log2 x - 3 3log x + 2 = 3log1
3log2 x - 3 3log x + 2 = 0
a2 - 3a + 2 = 0
(a - 2) (a - 1) = 0
a = 2
3log x = 2
3log x = 3log 32
x = 9
p = 9
a = 1
3log x = 1
3log x = 3log 31
x = 3
q = 3
Nilai dari 2(p + q) = 2 . (9+3) = 2 . 12 = 24
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