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D( x )
5/(v^2) = 0
u^2 = 0
v^2 = 0
5/(v^2) = 0
5/(v^2) = 0
5*v^-2 = 0
x należy do R
u^2 = 0
u^2 = 0
u^2 = 0
x należy do R
v^2 = 0
v^2 = 0
v^2 = 0
x należy do R
x belongs to the empty set
((7/(u^2))*v)/(5/(v^2))-(1/u) = 0
x belongs to the empty set
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