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- Xref: sparky sci.math:17295 sci.physics:21574
- Path: sparky!uunet!olivea!apple!uuwest!max
- From: max@west.darkside.com (Erik Max Francis)
- Newsgroups: sci.math,sci.physics
- Subject: Re: Help me deal w/ infinity
- Message-ID: <oJe7VB5w165w@west.darkside.com>
- Date: 22 Dec 92 08:53:23 GMT
- References: <BzL73K.9xr@usenet.ucs.indiana.edu>
- Organization: The Dark Side of the Moon +1 408 245 SPAM
- Lines: 28
-
- mkohlhaa@silver.ucs.indiana.edu (mike) writes:
- /
- > My skeptical friends point out the "subract N from both sides" lines as
- > the problem with the equation. They think that it's bogus that I am
- > litterally subrtracting an N from one side, but subtracting it's equivalent,
- > namely a .9(r) from the other side.
-
- The above isn't a _proof_ that 0.9... = 1, but it is a sufficient
- motivation. The actual proof would be done with infinite series.
-
- If you define N = 0.9... (or 0.9(r) in your notation), then N = 0.9...
- period. Talking about N and talking about 0.9... would thus be exactly
- the same. Because of that,
-
- 10 N = 0.9...
-
- you could substitute 0.9... with N (because that's how you _defined_ it),
- and get
-
- 10 N = N
-
- just as you expected.
-
-
- ____ Erik Max Francis -- ..!apple!uuwest!max -- max@west.darkside.com __
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