Question

How do I type a union of all sets?

Answer 1

\[ A = \bigcup_{x \in B} O_x \]

\[ A = \mathop{\cup}_{x \in B} O_x \]

Answer 2

\bigcup_{x \in N}

Answer 3

\[ \bigcup_{x \in B} \]

Answer 4

\[\bigcap_{n=1}^{\infty}A_{n}\]

Answer 5

\(\color{#0cbb34}{\text{Originally Posted by}}\) @mhchen
\[\bigcap_{n=1}^{\infty}A_{n}\]
\(\color{#0cbb34}{\text{End of Quote}}\)
\(\color{#0cbb34}{\text{Originally Posted by}}\) @mhchen
\[ \bigcup_{x \in B} \]
\(\color{#0cbb34}{\text{End of Quote}}\)