- May 7, 2021
naurrrrr my friends all say it looks like titties
The wording of that sample proportion question was a real pain trying to dissect in the heat of the moment but looking at it now and really taking a good amount of time to comprehend it, I do see what you mean.Also, slightly controversial, I quite liked the sample proportion question as it really tested whether you knew your stuff conceptually. Most sample proportion questions are pretty generic just blindly plugging numbers into formulae.
i feel like the time was super tight this year, but content wise this year was easier lol...i just made many mistakes anyways
do you think getting the answer of 6000 would be sufficient for 3 marks regardless if we had any errors with inequalities in our working??Also, slightly controversial, I quite liked the sample proportion question as it really tested whether you knew your stuff conceptually. Most sample proportion questions are pretty generic just blindly plugging numbers into formulae.
Im confused. Is Q12A going up the correct solutions (always above x axis) or going down (below x axis)? which one is the correct answerLooking at the solutions provided above:
- there is a small error in Q5 where as , but the solution writer has stated that . This is because . Thus, the angle must be obtuse or - the solution writer is correct that NESA have made a mistake in including in the category of "obtuse" angles.
- In q11(h), though it is not in the syllabus, a potentially simpler solution is:
- Per the discussion above, q12(a) appears wrong
- the handling of the absolute value in q12(b) is wrong as the temperature is increasing towards 25, hence and the equation is where and . The solutions state that and then find , which is a contradiction. They should have and to give .
- The resulting equation is better written as so that the term does not appear to be part of the log. Alternatively, it can be written as or as .
- For 12(c), the conclusion should be for integers or for .
- With q13(b), I wonder if the marking will require a justification that at impact with the wall proves that it has yet to hit the floor...
- I am confident that q14(a) is meant to be solved by vectors
Assuming that the slope field posted elsewhere in this thread is accurate, the path will have a minimum stationary point and always be above the -axisIm confused. Is Q12A going up the correct solutions (always above x axis) or going down (below x axis)? which one is the correct answer
its true, my english tutor got half marks for mod c and unseen but idk for maths. probs not.Just for clarification, I believe there is no half marks awarded in the HSC, but someone can let me know if they do in fact provide half marks.
Just realised the x and y axes are differently orientated. Is that a typo? Or is that deliberate?
I doubt it. Here are another set of solutions, by Nash: https://cdn.discordapp.com/attachme...021_HSC_Mathematics_Extension_1_Solutions.pdfI could be wrong but I don't think that diagram was the exact one on the writing booklet. We'll have to wait and see when the actual paper is posted tomorrow