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D( x )
x-2 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x in (-oo:2) U (2:+oo)
18/(x-2) = 4/3 // - 4/3
18/(x-2)-(4/3) = 0
18/(x-2)-4/3 = 0
(3*18)/(3*(x-2))+(-4*(x-2))/(3*(x-2)) = 0
3*18-4*(x-2) = 0
62-4*x = 0
(62-4*x)/(3*(x-2)) = 0
(62-4*x)/(3*(x-2)) = 0 // * 3*(x-2)
62-4*x = 0
62-4*x = 0 // - 62
-4*x = -62 // : -4
x = -62/(-4)
x = 31/2
x = 31/2
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