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D( x )
x^-5*y^3 = 0
x = 0
(x^-5*y^3)^-5 = 0
X^-3*y^3 = 0
x^-5*y^3 = 0
x^-5*y^3 = 0
x^-5*y^3 = 0 // : y^3
x^-5 = 0
x należy do O
x = 0
x = 0
(x^-5*y^3)^-5 = 0
(x^-5*y^3)^-5 = 0
x^25*y^-15 = 0 // : y^-15
x^25 = 0
x = 0
X^-3*y^3 = 0
X^-3*y^3 = 0
X^-3*y^3 = 0
x należy do R
x belongs to the empty set
((X^-3*y^3)^-4)/((x^-5*y^3)^-5) = 0
x belongs to the empty set
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