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re: HSC Chemistry Marathon Archive Correct. Isn't neutral water defined with pH 7?

+1 (lol)

HSC Chemistry Marathon The HSC Chemistry Marathon is an open chain of questions between students. It works by answering a question then posting another question and allowing the cycle to repeat itself. Rules: - After answering a question, always provide a new one - this is what keeps the...

Re: HSC 2013 4U Marathon it's okay dude.

Re: HSC 2013 4U Marathon You could have also replaced k with k+1.

Re: HSC 2013 4U Marathon yeah, whichever ones you have to spare. I don't mind if it's a 2012 one.

Re: HSC 2013 4U Marathon Carrot, mind sharing some of the rejected BOS trial questions?

Re: HSC 2013 4U Marathon Nice, looks like it's going to be pretty tedious though. Second method looks much better to me.

Re: HSC 2013 4U Marathon I'm going to keep thinking about it. Got nothing so far.

Re: HSC 2013 4U Marathon lol, it always comes to probability with you, doesn't it haha..

Re: HSC 2013 4U Marathon The only way I can think of is mathematical induction. Also, when n=1, LHS=[sin(θ)+sin(θ)[1-sin(θ)]]/[2-2cos(θ)]=sin(θ)[2-sin(θ)]/[2-2cos(θ)] RHS=sin(θ) LHS=/=RHS Maybe your formula is wrong?

Re: HSC 2013 4U Marathon ah right, shit.

Re: HSC 2013 4U Marathon sean, one question bro, how do you know (0,pi) is open and not [0,pi]?

Re: HSC 2013 4U Marathon Well, by conjugate root theorem, the modulus has to be 1 given the roots are non-real anyway. Say some non-real number a is a root of x^2+Ax+1=0 then conjugate(a) is a root. But 1/a is also a root. => conjugate(a)=1/a <=> lal=1

Okay thanks for that.

What do you think is the minimum rank in english required?

Okay thanks deswa, but when you say 'slightly lower' in english, that would mean like around 10th right?

Okay thanks for that mate. The dux of my school this year got 96.55 and he was roughly 10th in english.

Well this year we had zero b6s in physics (lol) and a couple b6s in chemistry. In advanced english, about 6-7 b6s. I reckon my main problem is going to be english though, currently ranked 17/44.

Okay thanks.