6/z+12/7z

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Solution for 6/z+12/7z equation: 


D( z )

z = 0

z = 0

z = 0

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

(12/7)*z+6/z = 0

12/7*z^1+6*z^-1 = 0

(12/7*z^2+6*z^0)/(z^1) = 0 // * z^2

z^1*(12/7*z^2+6*z^0) = 0

z^1

(12/7)*z^2+6 = 0

(12/7)*z^2+6 = 0

DELTA = 0^2-(4*6*(12/7))

DELTA = -288/7

DELTA < 0

z in { } 

z belongs to the empty set

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