let x - {2, 3, 4, } and defined metric on I as d(x,y) = (x-41 find open ball B. (2,21 А. (о, ч) -B {1,2,3} c {2,3} D. {2
Posted: Tue Sep 07, 2021 7:46 am
let x - {2, 3, 4, } and defined metric on I as d(x,y) = (x-41 find open ball B. (2,21 А. (о, ч) -B {1,2,3} c {2,3} D. {2} E [2,3