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D( x )
(((((x^-5)/9)*y^1)/2)/(x^-2))/9 = 0
x = 0
x^-2 = 0
(((((x^-5)/9)*y^1)/2)/(x^-2))/9 = 0
(((((x^-5)/9)*y^1)/2)/(x^-2))/9 = 0
(((((x^-5)/9)*y)/2)/(x^-2))/9 = 0
1/162*x^-3*y = 0 // : 1/162*y
x^-3 = 0
x należy do O
x = 0
x = 0
x^-2 = 0
x^-2 = 0
1*x^-2 = 0 // : 1
x^-2 = 0
x należy do O
x in (-oo:0) U (0:+oo)
((((((x^-5)/9)*y^1)/2)/(x^-2))/9)^-6 = 0
((((((x^-5)/9)*y)/2)/(x^-2))/9)^-6 = 0
18075490334784*x^18*y^-6 = 0 // : 18075490334784*y^-6
x^18 = 0
x = 0
x in { 0}
x belongs to the empty set
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