(8/z+5)-(4/z+5)

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Solution for (8/z+5)-(4/z+5) equation: 


D( z )

z = 0

z = 0

z = 0

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

8/z-(4/z)-5+5 = 0

8/z-4*z^-1-5+5 = 0

4*z^-1 = 0 // : 4

z^-1 = 0

z naleu017Cy do O

z belongs to the empty set

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