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D( x )
b^2 = 0
a^2 = 0
b^2 = 0
b^2 = 0
b^2 = 0
x naleu017Cy do R
a^2 = 0
a^2 = 0
a^2 = 0
x naleu017Cy do R
x belongs to the empty set
(4*b^2)/(a^2)+(4*a^2)/(b^2)+8 = 0
x belongs to the empty set
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