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D( x )
x = 0
x^11 = 0
x = 0
x = 0
x^11 = 0
x^11 = 0
1*x^11 = 0 // : 1
x^11 = 0
x = 0
x in (-oo:0) U (0:+oo)
(((x^-2*y^5)^3)/(x^11))*y^-4 = 0
x^-17*y^11 = 0 // : y^11
x^-17 = 0
x należy do O
x belongs to the empty set
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