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D( x )
d^2 = 0
h^2 = 0
d^3 = 0
d^2 = 0
d^2 = 0
d^2 = 0
x naleu017Cy do R
h^2 = 0
h^2 = 0
h^2 = 0
x naleu017Cy do R
d^3 = 0
d^3 = 0
d^3 = 0
x naleu017Cy do R
x belongs to the empty set
((h/(d^2))/(h^2))/(d^3) = 0
x belongs to the empty set
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