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D( x )
2*x-4 = 0
2*x-4 = 0
2*x-4 = 0
2*x-4 = 0 // + 4
2*x = 4 // : 2
x = 4/2
x = 2
x in (-oo:2) U (2:+oo)
-1/(2*x-4) > 6 // - 6
-1/(2*x-4)-6 > 0
(-6*(2*x-4))/(2*x-4)-1/(2*x-4) > 0
-6*(2*x-4)-1 > 0
23-12*x > 0
(23-12*x)/(2*x-4) > 0
(23-12*x)/(2*x-4) > 0 // * (2*x-4)^2
(23-12*x)*(2*x-4) > 0
( 2*x-4 )
2*x-4 > 0 // + 4
2*x > 4 // : 2
x > 4/2
x > 2
( 23-12*x )
23-12*x > 0 // - 23
-12*x > -23 // : -12
x < -23/(-12)
x < 23/12
(-oo:23/12) (23/12:2) (2:+oo) 2*x-4 - - + 23-12*x + - -
x in (23/12:2)
(23/12:2)
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