(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

http://www.mediafire.com/?rhnyop6erds34db

This was a question from the HSC Advanced maths exam in Australia, the second easiest maths course.

2. Relevant equations

given*

3. The attempt at a solution

I have no idea ):

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# Homework Help: Show that 4c=1+4r^2

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