7/4=5/z-2

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Solution for 7/4=5/z-2 equation: 


D( z )

z = 0

z = 0

z = 0

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

7/4 = 5/z-2 // - 5/z-2

7/4-(5/z)+2 = 0

7/4-5*z^-1+2 = 0

-5*z^-1 = -15/4 // : -5

z^-1 = 3/4

-1 < 0

1/(z^1) = 3/4 // * z^1

1 = 3/4*z^1 // : 3/4

4/3 = z^1

z = 4/3

z = 4/3

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