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Constant acceleration means that the acceleration is simply a number, like 3, 4 or whatever it might be it doesnt matter. For example \ddot{x}=4t where t is time, that example above is NOT constant due to it well not being at a fixed constant value but varying according to time. So lets...

You will need to do both sum and product of roots, then solve simultaneously. x^2+(k+1)x+\frac{k+1}{4}=0 Let our roots be alpha and beta, however the condition is that both roots are the same, so therefore beta must equal alpha. Hence our roots are then, alpha and alpha. Using sum of roots...

My solution and diagram If I am guessing the dimensions in your diagram correctly, x is the distance of the man from the pole, and y is the length of his shadow (or vice versa). So to find the rate at which the end of his shadow is moving will be d(y+x)/dt We can easily label y+x=z as the...

Maybe you should have a go at Realise's question again? http://community.boredofstudies.org/showthread.php?t=291369&p=6101314&viewfull=1#post6101314

How would we get the actual value of k if we used products of roots?

Ah ok thanks for the advice man :] Anyone with suggestions on what economics articles I should be reading to get a good background for statistics and background knowledge?

Ah I see, so would it be wise to go ahead of the class in learning 4U? I dont want to learn the content with a wrong idea. For Extension 2 English, I think I have a good idea but I think Ill speak with my English teacher this first week deeply about it and see if it will fetch me something...

I like Physics in general, exploring concepts such as Space and Motion, however at times Preliminary Physics gets very frustrating due to the huge amount of rote learning involved (less so for Physics I guess). But people tell me that HSC Physics is not what I expect Physics to be, and to be -...

May I ask what topic you did for your Major Work? Thanks :]

From what it seems 4U English really isnt that hard, its just time consuming because of diary thing and the major work.

If Im aiming for state rank for 4U maths is it best for me to drop Ext 2 English? I want to try it out since it was offered to me among a little number of people so I dont want a potentially good opportunity to go to waste. But realistically should I drop it?

Lol, my heart sank when he told me he is doing the 2013 not the 2012 HSC for 4U (welp there goes any minute chance at 1st lol). I dont think Im that good enough to get 95/100 but 95+ is the goal. (Even though Id REALLY like to state rank) And despite other people saying that Extension 2 is...

Oh I misread your post, so he managed 100 Internal average?

Im pretty sure no one has gotten full marks in 4U since like 1993 or something by this guy (forgot his name)

Ive heard from people that Extension 2 is getting easier, so do you guys think a 100 may be seen this year?

Do you know what Timothy Large got raw? (1st in state last year).

What raw mark out of 100 (or 120) would I need to be able to state rank 4U Maths? (90/95?)

f_n(x)=f_0(f_{n-1}(x))=f_0(f_0...(f_0(x))) Where there are an n number of f_0 f_0(f_0(x))=\frac{-1}{x}+1 Through algebra f_0(f_0(f_0(x)))=x Therefore for every multiple of 3 of f_0, it will equal x, So 6 number of f_0 is x 2010 number of f_0 is x Therefore...

531441 is 3^12 and 12 is a sublime number :s

Definitely not :) They are the only two numbers known to have this same property http://en.wikipedia.org/wiki/Sublime_number