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FYI I wrote that question lol

What did you guys think was the hardest question in the paper? (both 2U and 4U)

Hope you guys enjoyed that paper! ;)

So Carrot decided to give student numbers on the day instead. When you arrive, please register your attendance and you will be provided a student number.

Carrot will be sending all your student numbers shortly. Also, he will be loading a file of a general writing booklet which you will be asked to print sufficient copies at home (one for each short answer question) and bring to the exam day. This is just to save time/cost in printing them out...

That's true but you can still state rank without coming first internally. For example, if your external mark was 100 and your internal mark was 99 and the person who ranked first internally dropped ranks dramatically then your final mark of 99.5 could still qualify as a state rank depending on...

Keep in mind the final marks are in 0.5 increments as they are the average of internal and external marks. Further to this, where there are ties purely on marks, the Board then considers performance in related courses (e.g. marks in Ext1 when ranking Ext2) to break those ties. I'm sure there are...

That doesn't make sense. The Board determines state ranks by differentiating the smallest of margins and in some cases taking into consideration performance in related courses to break ties. The fact there exists a tie suggests that there was nothing the Board could find that could have...

I've asked this question before and no one seems to know the answer. If Anthony Henderson was the only one supposedly known to have got full marks in 1993, why was he placed equal first with a girl from Meriden School? See http://www.boardofstudies.nsw.edu.au/ebos/static/OM_CM_1993_12_20172.htm

Keep in mind this notion of a dummy variable makes sense because the integral is definite and always evaluates to a constant. You can't argue the same thing if you are doing a substitution on an indefinite integral.

But t is a variable. How do you know that we will hit max range when t is still there and could go to infinity to maximise the displacement irrespective of the angle?

A critical point also includes points where the derivative is zero.

There are 5 terms in this expansion. The middle term is the 3rd term, so use the general term to find T3.

The point of the 2U course is to get students to learn the foundations of calculus without the need to go into extra levels of complexity as well as develop proper logical reasoning skills which you don't really cover in General. For many disciplines at university whether they be in the sciences...

lol I thought that was the easiest Q16 of the lot

I think the MC's for Ext2 have been getting harder in successive years but I think the difficulty otherwise has remained consistent across 2013 and 2014 at least. Given the 2015 paper is still under development, I can't really comment much on it lol.

Re: HSC 2015 2U Marathon Think about what the question is asking. You want your savings to actually grow without bound over time, so there is a certain condition you need to impose.

Re: HSC 2015 2U Marathon Not quite correct. The scenario is that the person is receiving income of A each year, rather than as a one-off deposit.

Re: HSC 2015 2U Marathon By the way did anyone actually try answering the question in the original post?

With respect to IB, the reason the salaries are high is partly because the hours are long. When you calculate their base salary per hour then it is pretty 'average'. The real moolah comes when you get your bonuses but that is obviously contingent on you performing well. If you don't perform well...