## anonymous 5 years ago Im posting up a question on complex nos..plz help

1. anonymous

worr not,i will help u!

2. anonymous

oooh ans befor question

3. anonymous

if $1,\alpha1, \alpha2, ...\alpha(n-1)$ are the nth roots of unity, then find the value $\sum_{k=1}^{n-1}[1/(\alpha(k)-1)]$

4. anonymous

wow i want a medal too!!

5. anonymous

make that [1/(z-alpha(k)}

6. anonymous

if 1,α1,α2,...α(n−1) are the nth roots of unity, then find the value ∑k=1n−1[1/z-(α(k))]

7. anonymous

where z is a complex no.?

8. anonymous

find $\sum_{k=1}^{n-1}[1/(z-\alpha(k))]$

9. anonymous

yeAH answer in terms of z and n

10. anonymous

I wonder! there z no any symbol of complex no.

11. anonymous

what?