5z^5/z^7

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Solution for 5z^5/z^7 equation: 


D( z )

z^7 = 0

z^7 = 0

z^7 = 0

1*z^7 = 0 // : 1

z^7 = 0

z = 0

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

(5*z^5)/(z^7) = 0

5*z^-2 = 0 // : 5

z^-2 = 0

z należy do O

z belongs to the empty set

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