81/z=9

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Solution for 81/z=9 equation: 


D( z )

z = 0

z = 0

z = 0

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

81/z = 9 // - 9

81/z-9 = 0

81*z^-1 = 9 // : 81

z^-1 = 1/9

-1 < 0

1/(z^1) = 1/9 // * z^1

1 = 1/9*z^1 // : 1/9

9 = z^1

z = 9

z = 9

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