7z/z^2-16

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Solution for 7z/z^2-16 equation: 


D( z )

z^2 = 0

z^2 = 0

z^2 = 0

1*z^2 = 0 // : 1

z^2 = 0

z = 0

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

(7*z)/(z^2)-16 = 0

7*z^-1 = 16 // : 7

z^-1 = 16/7

-1 < 0

1/(z^1) = 16/7 // * z^1

1 = 16/7*z^1 // : 16/7

7/16 = z^1

z = 7/16

z = 7/16

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