(²log x-3) . ²log x > 4
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Misal:
²log x adalah a
Jwab:
(a-3).a > 4
= a² - 3a > 4
= a² - 3a - 4 > 0
= (a - 4)(a + 1)
a = 4 atau a = -1
a = 4
²log x = 4
x = 2⁴
x = 16
a = -1
²log x = -1
x = 2⁻¹
x = 1/2
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