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#1 2008-02-21 05:25:18

tony123
Member
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
Moderator
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
Member
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? Doesn’t

imply

instead? dunno

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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
Member
Registered: 2007-02-23
Posts: 6,868

Re: postive integers d,a,b,c

Aha, I get it now! Excellent proof, by the way. up

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