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D( x )
(6*a^3*b)^2 = 0
(6*a^3*b)^2 = 0
(6*a^3*b)^2 = 0
36*a^6*b^2 = 0
x naleu017Cy do R
x belongs to the empty set
((2*a^2)^3*(3*b)^2)/((6*a^3*b)^2) = 0
x belongs to the empty set
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