union of an interval

[aditi5000]

Hey, how do you solve such questions:

union [1/i , 1-1/i] for i=1 to infinity --- answer (0,1)

I take limits approaching infinity at the upper and lower bounds but then i get stuck with whether its an open or closed interval.

[lovekesh]

salvation lies in Simon and Blume. Probably chapter 13, limits and open sets or sumthn like that.

[aditi5000]

Will go through! Thanks :)