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D( x )
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0
3*x-2 = 0 // + 2
3*x = 2 // : 3
x = 2/3
x in (-oo:2/3) U (2/3:+oo)
(4-(2*x))/(3*x-2) <= 0
(4-2*x)/(3*x-2) <= 0
( 3*x-2 )
3*x-2 <= 0 // + 2
3*x <= 2 // : 3
x <= 2/3
( 4-2*x )
4-2*x <= 0 // - 4
-2*x <= -4 // : -2
x >= -4/(-2)
x >= 2
(-oo:2/3) (2/3:2) (2:+oo) 3*x-2 - + + 4-2*x + + -
x in (-oo:2/3) U <2:+oo)
(-oo:2/3) U <2:+oo)
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