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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)
(2*x)/(x-2) > 0
( 2*x )
2*x+0 > 0 // - 0
2*x > 0 // : 2
x > 0/2
x > 0
( x-2 )
x-2 > 0 // + 2
x > 2
(-oo:0) (0:2) (2:+oo) 2*x - + + x-2 - - +
x in (-oo:0) U (2:+oo)
(-oo:0) U (2:+oo)
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