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D( x )
x = 0
((((x^-7)/8)*y^1)/4)/((x^-3)/8) = 0
(x^-3)/8 = 0
x = 0
x = 0
((((x^-7)/8)*y^1)/4)/((x^-3)/8) = 0
((((x^-7)/8)*y^1)/4)/((x^-3)/8) = 0
((((x^-7)/8)*y)/4)/((x^-3)/8) = 0
1/4*x^-4*y = 0 // : 1/4*y
x^-4 = 0
x należy do O
(x^-3)/8 = 0
(x^-3)/8 = 0
1/8*x^-3 = 0 // : 1/8
x^-3 = 0
x należy do O
x in (-oo:0) U (0:+oo)
(((((x^-7)/8)*y^1)/4)/((x^-3)/8))^-8 = 0
(((((x^-7)/8)*y)/4)/((x^-3)/8))^-8 = 0
65536*x^32*y^-8 = 0 // : 65536*y^-8
x^32 = 0
x = 0
x in { 0}
x belongs to the empty set
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