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#1 2008-02-21 05:25:18
- tony123
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- Registered: 2007-08-03
- Posts: 229
postive integers d,a,b,c
find all postive integers d,a,b,c
which satisfy
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#2 2008-02-21 05:35:00
- mathsyperson
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- Registered: 2005-06-22
- Posts: 4,900
Re: postive integers d,a,b,c
Why did the vector cross the road?
It wanted to be normal.
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#3 2008-02-21 06:12:58
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: postive integers d,a,b,c
mathsyperson wrote:
Hence, for the equation to hold, 3/D ≤ 1 must be true.
How did you get that? Doesnt
imply
instead? 
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#4 2008-02-21 07:12:14
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: postive integers d,a,b,c
True enough. Just a typo though, the reasoning and answer are still the same.
Why did the vector cross the road?
It wanted to be normal.
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#5 2008-02-21 08:10:35
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: postive integers d,a,b,c
Aha, I get it now! Excellent proof, by the way. 
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