Question

How do you solve this using the power rule?

f(z) = (z^2 + 1)/3z

Answer 1

what do you mean? are you wanting to take a derivative?

Answer 2

Yes

Answer 3

so rewrite...\[\frac{ \left( z^2+1 \right) }{ 3z }=\frac{ \left( z^{-1} \right)\left( z^2+1 \right) }{ 3 }=\frac{ z+z^{-1} }{ 3 }\]

Answer 4

or if you like...\[\frac{ 1}{ 3 }\left( z+z^{-1} \right) \]

Answer 5

Thanks

Answer 6

you're welcome