9z^-4/6z^-2

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Solution for 9z^-4/6z^-2 equation: 


D( z )

z = 0

z = 0

z = 0

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

((9*z^-4)/6)*z^-2 = 0

3/2*z^-6 = 0 // : 3/2

z^-6 = 0

z naleu017Cy do O

z belongs to the empty set

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