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1.(²log x)(²log x-1)+4.(²log x-1)-3.(²log x) < 0, dan (²log x)(²log x-1)>0
²log² x - ²log x + 4.²log x - 4 - 3.²log x < 0
²log² x - 4 < 0
²log x < +- 2
-2 < ²log x < 2
1/4 < x < 4.......................(1)
(²log x)(²log x-1)>0
²log²x - ²log x > 0
²log x(²log x - 1)> 0
²log x < 0 dan ²log x > 1
x < 1 dan x > 2............(2)
gabung batas 1 dan 2:
1/4 < x < 1 dan 2 < x < 4..........opsi D