# Union and Intersection of sets

## Homework Statement

a) Find: $$\bigcup_{i=1}^{\infty}} A_i$$

b) Find: $$\bigcap_{i=1}^{\infty}} A_i$$

Where $A_i$ = (0,i), that is, the set of real numbers x with 0 < x < i

I was doing okay when they gave me $A_i$ = {i, i+1, i+2, ...}, but now that they're giving me (0,i), and introducing x, I'm getting confused.

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Just noticed that I placed this in the wrong forum. I usually come to the Physics forum, however this time I meant for Calculus.
Tried to find a way to delete or move it, but not finding a way.

If an admin finds this, just delete it. I'll post it in the proper forum.

Apologies.

CompuChip