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D( x )
-2*s-(4*t) = 0
-2*s-(4*t) = 0
-2*s-(4*t) = 0
-2*s-4*t = 0
-2*s-4*t = 0
x naleu017Cy do R
x belongs to the empty set
(32*t^2-8*s^2)/(-2*s-(4*t)) = 0
x belongs to the empty set
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