From: utzoo!decvax!harpo!ihnp4!ixn5c!inuxc!pur-ee!uiucdcs!becker Newsgroups: net.math Title: = .9999 . . . ? - (nf) Article-I.D.: uiucdcs.1374 Posted: Tue Jan 25 00:27:03 1983 Received: Thu Jan 27 20:27:03 1983 #N:uiucdcs:28200002:000:748 uiucdcs!becker Jan 24 23:41:00 1983 my room-mate and i got in an argument over this: i said 1 = .999999 . . . . and gave a couple of proofs 1: 1/9 = .1111 . . . . 9 * (1/9) = 9 * (.1111 . . . .) 9/9 = .9999 . . . . 1 = .9999 . . . . qed 2: 10 * (.9999 . . . .) = 9.9999 . . . . 10 * (.9999 . . . .) - 1 * (.9999 . . . .) = (9.9999 . . . .) - (.9999 . . . .) = 9 so 9 * (.9999 . . . .) = 9 (.9999 . . . .) = 1 qed these may be no news to you. however, edward did not believe them. anyone out there have a good convincing proof he might believe? i wouldn't want to say that money was bet on this question, but . . . thanks, craig