Question

Persamaan 2 log^2x - 2logx^3 +2=0 berlaku untuk x

Answer 1

²log² x - 3 .²log x + 2 = 0
(² log x)² - 3(²log x)+ 2 = 0
²log x = a --> x = 2ᵃ dan x ≥ 0

a² -3a + 2 = 0
(a -2)(a -1 ) = 0
a = 2--> x = 2² = 4
a= 1 --> x = 2¹ = 2 

x = (2, 4)