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 Post subject: Row reduce this !Posted: Mon, 21 May 2012 05:59:09 UTC
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Joined: Mon, 21 May 2012 05:57:23 UTC
Posts: 3
i have been cracking my head over this matrix for almost 20mins and i stll cant find an aswer to it.

a = [k 1 1 1
1 k 1 1
1 1 k 1]

thanks

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 Post subject: Re: Row reduce this !Posted: Mon, 21 May 2012 06:03:43 UTC
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Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
olivertan92 wrote:
i have been cracking my head over this matrix for almost 20mins and i stll cant find an aswer to it.

a = [k 1 1 1
1 k 1 1
1 1 k 1]

thanks

Divide and conquer.

If k=1, then ...
Otherwise ...

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 Post subject: Re: Row reduce this !Posted: Mon, 21 May 2012 06:22:46 UTC
 S.O.S. Newbie

Joined: Mon, 21 May 2012 05:57:23 UTC
Posts: 3
I could only do one step..

k 1 1 1
0 1/k-k 1/k-1 1/k-1
0 1/k-1 1/k-k 1/k-1

how do i go on and simplify the last row?

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 Post subject: Re: Row reduce this !Posted: Mon, 21 May 2012 06:56:43 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
olivertan92 wrote:
I could only do one step..

k 1 1 1
0 1/k-k 1/k-1 1/k-1
0 1/k-1 1/k-k 1/k-1

how do i go on and simplify the last row?

You need some parentheses methinks.

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 Post subject: Re: Row reduce this !Posted: Mon, 21 May 2012 07:20:31 UTC
 S.O.S. Newbie

Joined: Mon, 21 May 2012 05:57:23 UTC
Posts: 3
what? parentheses methink? tried google-ing it and nothing maths related showed up. Could someone like point me in the right direction.. thanks

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 Post subject: Re: Row reduce this !Posted: Mon, 21 May 2012 07:30:52 UTC
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Joined: Wed, 30 Mar 2005 04:25:14 UTC
Posts: 12103
Location: Austin, TX
olivertan92 wrote:
what? parentheses methink? tried google-ing it and nothing maths related showed up. Could someone like point me in the right direction.. thanks

methinks = "I believe"

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