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D( x )
(2*a^-1*b^2)^2 = 0
(2*a^-1*b^2)^2 = 0
(2*a^-1*b^2)^2 = 0
4*a^-2*b^4 = 0
x należy do R
x belongs to the empty set
(3*a^3*b)/((2*a^-1*b^2)^2) = 0
x belongs to the empty set
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