Arbitrary union of open sets is open|| Finite intersection of open sets is open

[@sscmathsgaganpratap5083]

Great explanation mam

[@Menofmathematics123]

Great explanation ✨

[@sonali5687]

👌best!

[@Ruma-cf8tq]

Thank you mam

[@yourkaru]

8:01 finite intersection thm.

[@gudiyamishra2223]

show that every open set is a union of open interval. please btaiye

[@vikramsevada9290]

Mam examples b do inke

[@Freecoversongs-t3b]

Give an example of an open which is not an interval .