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D( x )
3*x+(2/2)*x-4 = 0
3*x+(2/2)*x-4 = 0
3*x+(2/2)*x-4 = 0
4*x-4 = 0 // + 4
4*x = 4 // : 4
x = 4/4
x = 1
x in (-oo:1) U (1:+oo)
(3*x+(2/2)*x-4)^-6 = 0
1/((4*x-4)^6) = 0
x belongs to the empty set
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