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