3/z+7/4z2

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Solution for 3/z+7/4z2 equation: 


D( z )

z = 0

z = 0

z = 0

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

(7/4)*z^2+3/z = 0

7/4*z^2+3*z^-1 = 0

z^-1*(7/4*z^3+3) = 0

7/4*z^3 = -3 // : 7/4

z^3 = -12/7

z^3 = -12/7 // ^ 1/3

z = -(12/7)^(1/3)

1/z = 0

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

z^-1 = 0

z naleu017Cy do O

z = -(12/7)^(1/3)

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