280/z=-10

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Solution for 280/z=-10 equation: 


D( z )

z = 0

z = 0

z = 0

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

280/z = -10 // + 10

280/z+10 = 0

280*z^-1 = -10 // : 280

z^-1 = -1/28

-1 < 0

1/(z^1) = -1/28 // * z^1

1 = -1/28*z^1 // : -1/28

-28 = z^1

z = -28

z = -28

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