# accumulation point help

• February 4th 2010, 11:30 AM
LCopper2010
accumulation point help
How do you determine the accumulation point of a set?

For example,

What is the accumulation point of $z_{n}$ = $i^n$ where n $\in$ $Z^+$

And what is the accumulation point of the following?

(a) $z_{n}$ = $i^n$/n where n $\in$ $Z^+$
(b) 0 $\leq$ arg(z) < $\pi$/2 and z not equal to 0
(c) $z_{n}$ = $(-1)^n$(1+ i ) (n-1)/n where n $\in$ $Z^+$

Any help? Thanks!