(7/z-2)-1=2/z-2

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Solution for (7/z-2)-1=2/z-2 equation: 


D( z )

z = 0

z = 0

z = 0

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

7/z-2-1 = 2/z-2 // - 2/z-2

7/z-(2/z)-2-1+2 = 0

7/z-2*z^-1-2-1+2 = 0

5*z^-1 = 1 // : 5

z^-1 = 1/5

-1 < 0

1/(z^1) = 1/5 // * z^1

1 = 1/5*z^1 // : 1/5

5 = z^1

z = 5

z = 5

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