z+5/z

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Solution for z+5/z equation: 


D( z )

z = 0

z = 0

z = 0

z in (-oo:0) U (0:+oo)

z+5/z = 0

1*z^1+5*z^-1 = 0

(1*z^2+5*z^0)/(z^1) = 0 // * z^2

z^1*(1*z^2+5*z^0) = 0

z^1

z^2+5 = 0

z^2+5 = 0

DELTA = 0^2-(1*4*5)

DELTA = -20

DELTA < 0

z in { } 

z belongs to the empty set

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