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D( x )
(3*b^-1)/5 = 0
(2*a^-2)/((3*b^-1)/5) = 0
(3*b^-1)/5 = 0
(3*b^-1)/5 = 0
3/5*b^-1 = 0
x należy do R
(2*a^-2)/((3*b^-1)/5) = 0
(2*a^-2)/((3*b^-1)/5) = 0
10/3*a^-2*b = 0
x należy do R
x belongs to the empty set
((2*a^-2)/((3*b^-1)/5))^-1 = 0
x belongs to the empty set
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