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D( x )
20*v^5*w^5-(4*w^2) = 0
20*v^5*w^5-(4*w^2) = 0
20*v^5*w^5-(4*w^2) = 0
20*v^5*w^5-4*w^2 = 0
20*v^5*w^5-4*w^2 = 0
x należy do R
x belongs to the empty set
(8*w^4*x^6)/(20*v^5*w^5-(4*w^2)) = 0
x belongs to the empty set
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