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disgusting, 5 horrific circles, and one decent one, not good for you

lol you knew this was coming, but ill say 9th time is the charm:

Obviously americans think pentagon is better, as they name their defence centre after it. For me i dont give a toss, i get enough pleasure from each shape.

Re: 2012 HSC MX2 Marathon a better question would be to deduce the smallest positive root plus the smallest negative root is positve

Re: 2012 HSC MX2 Marathon the third root lies between -1 and 0

Yes that's what I was implying

I really like Euler's product formula for riemann zeta function as it gives a relation between an infinite sum of numbers involving rational numbers expressed as a product involving all prime numbers, which i believe is pretty amazing.

the question only asked for one direction, so i didnt need to prove the other, but i said from the start his method is better

no, cosine rule is not memorsing as we all have used that formula 200000... times, so it is apart of us, whereas that inequality i doubt we ever use

^ true, but it requires to memorise an inequality which you have to prove and im not a fan of memorising

cause a,b,c >0 i equated coef's with LHS and RHS and got each as 0, or you can equate from 4th last line

yeh i think that would be fine, a clever approach, here is cos rule method:

sydney grammar is currently testing the beta version of the cambridge 4u book which is like the 3u book. So if all goes well the 3u version of cambridge should be coming to 4u soon, hopefully. I can only drool of extension 4u questions

ahh my trial question, nice

it took me under a minute cause i already did this diagram where i proved the triangle was isosceles, so i already had a starting point

i found out that no one from the fort street krew could get this question out lol, and it took du over 20 mins to solve it...i guess there cohort isnt that strong.

but when you get to uni and do adv maths, then you can study maths all the time

if you think you will struggle just get tutoring by carrot or myself :P, then you will be more than fine.

there was an error in the 2001 paper i think it was, q7 the polynomial one, half state didnt find out, other half did, question was not taken out