- #1

nitro

- 9

- 0

## Homework Statement

is there are a set with countably infinite number of accumulation points?

## Homework Equations

is there a set with exactly two distinct accumulation points?

## The Attempt at a Solution

a set with two accumulation points might be: {1/n + (-1)^n}

i have no clue about the countably infinite one

hope someone could help!

thx a lot