4/9=2/z

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Solution for 4/9=2/z equation: 


D( z )

z = 0

z = 0

z = 0

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

4/9 = 2/z // - 2/z

4/9-(2/z) = 0

4/9-2*z^-1 = 0

-2*z^-1 = -4/9 // : -2

z^-1 = 2/9

-1 < 0

1/(z^1) = 2/9 // * z^1

1 = 2/9*z^1 // : 2/9

9/2 = z^1

z = 9/2

z = 9/2

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