9. Persamaan logaritma 2log2 x - 3 . 2log x - 10 = 0 mempunyai solusi x1 dan x2. Nilai x1 . x2 = ...
a. 2-5
b. 2-3
c. 22
d. 23
e. 25
Jawaban : D
2log2 x - 3 . 2log x - 10 = 0
A = 1
B = - 3
C = - 10
a = 2
x1 . x2 = a-B/A
x1 . x2 = 2-(-3)/1
x1 . x2 = 23
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