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D( x )
x = 0
(2*Y^9*x^-5)^-1 = 0
2*Y^9*x^-5 = 0
x = 0
x = 0
(2*Y^9*x^-5)^-1 = 0
(2*Y^9*x^-5)^-1 = 0
1/2*Y^-9*x^5 = 0 // : 1/2*Y^-9
x^5 = 0
x = 0
2*Y^9*x^-5 = 0
2*Y^9*x^-5 = 0
2*Y^9*x^-5 = 0 // : 2*Y^9
x^-5 = 0
x należy do O
x in (-oo:0) U (0:+oo)
(Z^2*x^3*y^-6)/((2*Y^9*x^-5)^-1) = 0
2*Y^9*Z^2*x^-2*y^-6 = 0 // : 2*Y^9*Z^2*y^-6
x^-2 = 0
x należy do O
x belongs to the empty set
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