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D( x )
2*x^7 = 0
x = 0
y^-5 = 0
(y^2)/(2*x^7) = 0
2*x^7 = 0
2*x^7 = 0
2*x^7 = 0 // : 2
x^7 = 0
x = 0
x = 0
x = 0
y^-5 = 0
y^-5 = 0
y^-5 = 0
x należy do R
(y^2)/(2*x^7) = 0
(y^2)/(2*x^7) = 0
1/2*x^-7*y^2 = 0 // : 1/2*y^2
x^-7 = 0
x należy do O
x belongs to the empty set
((y^2)/(2*x^7))^-3*((3*x^-3)/(y^-5))^3 = 0
x belongs to the empty set
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