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D( u )
u = 0
u = 0
u = 0
u in (-oo:0) U (0:+oo)
(3/2)*u-6+2 = -5/u-3 // + -5/u-3
(3/2)*u-(-5/u)-6+2+3 = 0
(3/2)*u+5*u^-1-6+2+3 = 0
3/2*u^1+5*u^-1-1*u^0 = 0
(3/2*u^2-1*u^1+5*u^0)/(u^1) = 0 // * u^2
u^1*(3/2*u^2-1*u^1+5*u^0) = 0
u^1
(3/2)*u^2-u+5 = 0
(3/2)*u^2-u+5 = 0
DELTA = (-1)^2-(4*5*(3/2))
DELTA = -29
DELTA < 0
u in { }
u belongs to the empty set
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