Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Math Topics » alt.algebra.help.independent

Topic: Help in two questions, please
Replies: 9   Last Post: Jan 31, 2012 8:48 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Avni Pllana

Posts: 491
Registered: 12/6/04
Re: Help in two questions, please
Posted: Oct 28, 2009 9:55 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

> Hi!
>
> Here are two questions that have me really stumped.
>
> Q1 - If x + y = 2 and x^2 + y^2 = 8, find
>
> a) xy
> b) x - y
>
> Do I solve these simultaneously? Quadratically? Or
> something else?
>
> Q2 - Complete the sequence:
>
> 7/8, 2/3, 1/2, 4/11, 1/4, ______, ______ .
>
> I seriously can't figure out any pattern here!
>
> Thanks.


Hi Mocha,

the sequence in Q2 may have to do with Farey sequence, see for example:

http://en.wikipedia.org/wiki/Farey_sequence

http://www.research.att.com/~njas/sequences/

Best regards,
Avni



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.