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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)
(3*x)/(x-2) < 1.5 // - 1.5
(3*x)/(x-2)-1.5 < 0
(3*x)/(x-2)+(-1.5*(x-2))/(x-2) < 0
3*x-1.5*(x-2) < 0
1.5*x+3 < 0
(1.5*x+3)/(x-2) < 0
(1.5*x+3)/(x-2) < 0 // * (x-2)^2
(1.5*x+3)*(x-2) < 0
( 1.5*x+3 )
1.5*x+3 < 0 // - 3
1.5*x < -3 // : 1.5
x < -3/1.5
x < -2
( x-2 )
x-2 < 0 // + 2
x < 2
(-oo:-2) (-2:2) (2:+oo) 1.5*x+3 - + + x-2 - - +
x in (-2:2)
(-2:2)
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