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D( x )
x = 0
x^-4 = 0
x^-2*((4*y^0*x^2)/8) = 0
x = 0
x = 0
x^-4 = 0
x^-4 = 0
1*x^-4 = 0 // : 1
x^-4 = 0
x naleu017Cy do O
x^-2*((4*y^0*x^2)/8) = 0
x^-2*((4*y^0*x^2)/8) = 0
x^-2*((4*x^2)/8) = 0
1/2 = 0
x belongs to the empty set
x in (-oo:0) U (0:+oo)
(x^-2*((4*y^0*x^2)/8))^-2*((x^-2)/(x^-4))*y^5 = 0
(x^-2*((4*x^2)/8))^-2*((x^-2)/(x^-4))*y^5 = 0
4*x^2*y^5 = 0 // : 4*y^5
x^2 = 0
x = 0
x in { 0}
x belongs to the empty set
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