Recent content by billym

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Here are the solutions (also edited original comment to include solutions above).

Here you go.

Afraid not, don't think I'm old enough to have a child doing the HSC!

Depending on your method, you may still get 1. Markers are not supposed to penalise if someone has clearly misread the question and in doing so it doesn't make the question easier. If it is clear that you misread and found the value for a minimum, but you still did some calculus in the process...

Your last step isn't valid. You can't jump from saying it is less than 3, therefore it is less than 1.

What's the reading error? Depending on the circumstances, if you're lucky you won't be penalised.

I just finished writing up my own solutions for that question, mine feels pretty clumsily worded though. Easy enough to see how to get the result, but my wording of the actual proof to justify the inequality is a bit shaky.

One of the conditions of the Gonski reform is to implement changes to all senior courses via the Australian Curriculum by 2018.

Draw a diagram, and place R where you think it should go. Using the similarity of the two triangles, try to find a relationship between the modulus of R (say z3) and the moduli of z1 and z2. Then try to do the same with the arguments. You should find a nice little result for z3 in terms of z1...

Re: MX2 Integration Marathon Nice question. Is it pi/[ab(a+b)] ?

As an Extension 2 teacher, I feel compelled to give my 2 cents here. I write all of my assessment tasks from scratch, and as braintic and Carrotsticks mentioned earlier, there are a LOT of ideas that get thrown around in the development of a question that will never see the light of day. I...

I tend to think if there was enough working to justify a 4th mark, they'd ditch the question rather than allocate 4 marks for a single question. Pretty rare for 4-markers to be in HSC exams nowadays.

I have been to various seminars and spoken about this issue with several different HSC markers. Induction questions are worth 3 marks, and the 3 marks are allocated as follows: 1st mark: Proving the statement is true for n=1. 2nd mark: Correctly integrating your assumption (assume true for...

Hi guys Does anyone know where one could obtain past Extension 2 papers from before 1995? I know that Board of Studies site has papers from 1995 - 2012 but haven't had any luck finding earlier papers online.