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Pertidaksamaan logaritma²log² x - ²log x² - 3 < 0
(²log x)² - 2 (²log x) - 3 < 0
²log x = a atau x = 2ᵃ dengan x > 0
a² - 2a - 3 < 0
(a -3)(a +1) < 0
a < 3 --> x < 2³ --> x < 8
a > -1 --> x < 2⁻¹ --> x > 1/2
HP x = ¹/₂ < x < 8