Question

4/z = 12/5 quanto vale z

Answer 1

Resposta:

D( z )

z = 0

z = 0

z = 0

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

4/z = 12/5 // - 12/5

4/z-(12/5) = 0

4/z-12/5 = 0

4*z^-1 = 12/5 // : 4

z^-1 = 3/5

-1 < 0

1/(z^1) = 3/5 // * z^1

1 = 3/5*z^1 // : 3/5

5/3 = z^1

z = 5/3

z = 5/3