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D( x )
((2*x^3*y^-2)/(x^2))*y^5 = 0
x^2 = 0
((2*x^3*y^-2)/(x^2))*y^5 = 0
((2*x^3*y^-2)/(x^2))*y^5 = 0
2*x*y^3 = 0 // : 2*y^3
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
(((2*x^3*y^-2)/(x^2))*y^5)^-2 = 0
1/4*x^-2*y^-6 = 0 // : 1/4*y^-6
x^-2 = 0
x należy do O
x belongs to the empty set
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