1/z+5/1/z-7

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Solution for 1/z+5/1/z-7 equation: 


D( z )

z = 0

z = 0

z = 0

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

1/z+(5/1)/z-7 = 0

1/z+5/z-7 = 0

6*z^-1 = 7 // : 6

z^-1 = 7/6

-1 < 0

1/(z^1) = 7/6 // * z^1

1 = 7/6*z^1 // : 7/6

6/7 = z^1

z = 6/7

z = 6/7

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