In Metric Space|Open sphere are open set|B.Sc 3rd year|UPSC optional|L19

[@studyiaswithvikashranjan3013]

🙏🙏🥰🥰 kya every open sphere is open set or an open sphere is open set .a dono questions ek he hai kya ???

[@divitasharma]

No cuz frst que. State 'EVERY' where as 2nd que state 'AN' So to prove 2nd u can just give one example which satisfy the statement And to prove 1st u have to show that statement hold for every open sphere

[@infinitethelearning4954]

Hiii