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D( x )
1-ln(2*x) = 0
2*x <= 0
1-ln(2*x) = 0
1-ln(2*x) = 0
1-ln(2*x) = 0 // - 1
-ln(2*x) = -1
-ln(2*x) = -1 // * -1
ln(2*x) = ln(e^1)
2*x = e^1
2*x-e^1 = 0
2*x-e = 0 // + e
2*x = e // : 2
x = e/2
2*x <= 0
2*x <= 0
2*x+0 <= 0 // - 0
2*x <= 0 // : 2
x <= 0/2
x <= 0
x in (0:e/2) U (e/2:+oo)
(2*X)/(1-ln(2*x)) = 0
t_1 = -ln(2*x)
(2*X)/(t_1+1) = 0
x belongs to the empty set
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