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#1 2008-07-19 07:47:54

tony123
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Without use of any calculator

Without use of any calculator, determine

Last edited by tony123 (2008-07-19 07:48:53)

 

#2 2008-07-25 21:39:43

JaneFairfax
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Re: Without use of any calculator



,
, and
all satisfy the equation
. Try and play around with that.


Q: Who wrote the novels Mrs Dalloway and To the Lighthouse?

A: Click here for answer.
 

#3 2008-07-25 21:58:11

tony123
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Re: Without use of any calculator

but from where you get these


JaneFairfax wrote:

 

#4 2008-07-25 23:25:33

JaneFairfax
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Re: Without use of any calculator

Never mind, forget what I wrote above. I was being naughty and used a calculator. tongue

But I got it now. Heres how.

By considering the sum of the complex roots of

, you have



But
.



Now









Note that
. Hence



And
. And there you have it. http://i188.photobucket.com/albums/z198/fairjane/Woohoo.gif

Last edited by JaneFairfax (2008-07-25 23:27:41)


Q: Who wrote the novels Mrs Dalloway and To the Lighthouse?

A: Click here for answer.
 

#5 2008-07-26 01:26:26

ZHero
Real Member

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Re: Without use of any calculator

up
Kya baat hai!!?
That's a nice smiley too by the way!


If two or more thoughts intersect with each other, then there has to be a point.
 

#6 2008-07-26 18:19:53

John E. Franklin
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Re: Without use of any calculator

Jane, I don't get where the cube is coming from in
your very last statement:


igloo myrtilles fourmis
 

#7 2008-07-26 18:26:04

ZHero
Real Member

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Re: Without use of any calculator

That's


If two or more thoughts intersect with each other, then there has to be a point.
 

#8 2008-07-26 21:54:41

Identity
Power Member

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Re: Without use of any calculator

Can't wait till I learn complex numbers, it looks so useful

 

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