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#1 2010-04-04 22:42:59

ZHero
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Registered: 2008-06-08
Posts: 1,889

Please Explain...








Last edited by ZHero (2010-04-05 19:31:17)


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#2 2010-04-05 02:22:35

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

Re: Please Explain...

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#3 2010-04-05 04:03:09

soroban
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Registered: 2007-03-09
Posts: 452

Re: Please Explain...




.

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#4 2010-04-05 05:37:58

ZHero
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Registered: 2008-06-08
Posts: 1,889

Re: Please Explain...

JaneFairfax wrote:

ZHero wrote:

Jane, can u tell me what does this N=-2 signify?? dunno:

Last edited by ZHero (2010-04-05 05:44:09)


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#5 2010-04-05 05:49:25

ZHero
Real Member
Registered: 2008-06-08
Posts: 1,889

Re: Please Explain...

soroban wrote:

NICE!!    up


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#6 2010-04-05 16:47:56

Avon
Member
Registered: 2007-06-28
Posts: 80

Re: Please Explain...

ZHero,

You haven't really shown that (N+2)^2 = 0, only that (N+2)^2 is divisible by 9.
Hence N must be one of 1,4,7 and you'll have to do something else to decide which.

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#7 2010-04-05 19:37:34

ZHero
Real Member
Registered: 2008-06-08
Posts: 1,889

Re: Please Explain...

Avon wrote:

ZHero,

You haven't really shown that (N+2)^2 = 0, ...

I just did my calculation above and got (N+2)^2=0.
I mean, I don't Want to Show that (N+2)^2=0.
I just want to know what information does (N+2)^2=0 hold??


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#8 2010-04-05 23:43:28

Avon
Member
Registered: 2007-06-28
Posts: 80

Re: Please Explain...

When you replace numbers by their digit sums and cast out nines you are essentially considering two numbers to be the same if they have the same remainder when divided by 9.


I would write
rather that
when I am doing this. Hence we have



We cannot now deduce that


since 0 has three square roots modulo 9. These are 0, 3 and 6 so we have


and since I'm biased against negative numbers

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#9 2010-04-06 00:37:33

ZHero
Real Member
Registered: 2008-06-08
Posts: 1,889

Re: Please Explain...

hi A1

Wonderful Explanation!!  thumbsup.gif

Now i got it...

Thx a Lot!

Last edited by ZHero (2010-04-06 02:29:13)


If two or more thoughts intersect, there has to be a point!

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