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D( x )
-3*a^-5*b^-3 = 0
-3*a^-5*b^-3 = 0
-3*a^-5*b^-3 = 0
-3*a^-5*b^-3 = 0
x naleu017Cy do R
x belongs to the empty set
(18*a^-2*b^10)/(-3*a^-5*b^-3) = 0
x belongs to the empty set
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