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2.⁴log²x - 14.⁴log x^½ + 3 = 02.⁴log²x - (14×½).⁴log x + 3 = 0
2.⁴log²x - 7.⁴log x + 3 = 0
misalkan ⁴log x = p
2p² - 7p + 3 = 0
(p - 3)(2p - 1) = 0
p = 3
⁴log x = 3
x1 = 4³ = 64
⁴log x = ½
x2 = 4^½ = √4 = 2
x1 + x2 = 64 + 2 = 66
81x1.x2 = 81(64)(2) = ...