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2/(⁵log (3x+1)) = 1/(⁵log 4)
2.⁵log 4 = ⁵log (3x+1)
⁵log 4² = ⁵log (3x+1)
16 = 3x+1
3x = 15
x = 5
2. ²log² (2x-2) - ²log (2x-2) - 2 = 0, misal y= ²log (2x-2)
y² - y - 2 = 0
(y-2)(y+1) = 0
y= -1 dan y= 2
saat y = -1
²log (2x-2) = -1
²log (2x-2) = ²log 1/2
2x-2 = 1/2
2x = 5/2
x = 5/4
saat y = 2
²log (2x-2) = 2
²log (2x-2) = ²log 4
2x-2 = 4
2x = 6
x = 3