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Yep. See Q14c) in this year’s BoS trials for Ext2 ;)

Correct. Your raw mark branches off into two different types of transformations: - Aligning (for your HSC certificate) - Scaling (for your ATAR)

Scaling is applied on raw marks. See below for a high level summary of the process: https://boredofstudies.org/threads/flowchart-of-how-hsc-marks-and-atar-are-determined.390261/

Interesting there are two normal approximation questions (and two induction questions for Ext2) when they usually only appear once. This paper is also very overweighted on vector questions lol

... and here are the student results for the 2022 Mathematics Extension 1 BoS trials! Apologies for having released this so late 🙏 Once again, thank you to everyone who participated and for your patience! Thanks to the other members of the marking team Paradoxica, dan964 and 1039213 for their...

Some general feedback comments from me on Q12: In Q12a), a number students stated 196x0.04 as the mean. This is incorrect for a number of reasons - the number itself is not in the right units as a percentage unemployment rate and 4% is the proportion from the one sample of 196, not the...

Hi all, Unfortunately there has been a delay in the marking for Mathematics Extension 1. Apologies for this. We will try to get this done as soon as possible. However, the solutions have now been written up and can be released to help with your studies. Please also note that the question...

This is because v is defined as velocity in the solution (with upwards defined as positive) instead of speed (which is what most people do). When you define v as speed then you tend to define the direction of motion as positive. This usually makes adding/subtracting the vectors more intuitive as...

I find it interesting that a number of the harder or more unusual questions in Ext2 lately come from topics that existed in the old syllabus. Where were these in the 2010s? In the years before the new syllabus, the HSC exams trended towards being more boring/generic (with a few exceptions) which...

They’re still being written up. Do you have any specific questions you want answers to?

@tgone wtf they actually asked the same question as this in this year’s HSC (with minor variations)….

Check out Q6a) from 2005 HSC…

Some general feedback on the sections I marked for Ext2: Almost 10% of the attendees left at least one question in the multiple choice unanswered. If you don't know the answer to the question, then just guess! You have a 1/4 chance of getting 1 extra mark versus a guaranteed zero. If this was...

..... and here are the solutions and student results for the 2022 Mathematics Extension 2 BoS trials! 🎆 Thank you to everyone who participated and for your patience! Thanks especially to the other members of the marking team Paradoxica, dan964 and 1039213 for their hard work in helping to get...

Coming soon… just finalising a few pieces

Nekkminit it’s only hard because of “brute force” questions (e.g. prove formula for sin 16x by De-Moivre’s theorem)

You might find this useful: https://boredofstudies.org/threads/a-guide-to-maximising-your-graduate-employability-whilst-at-university.319711/

Basically what 011235 wrote with one little twist. The expected method involves squaring both sides, which introduces an incorrect solution. You’ll need to pick the correct one with justification. A lot of questions are based on well known results in the broader mathematics/chemistry field...

In general, when doing a trigonometric substitution to solve a polynomial, there are usually two approaches: x = tan θ (which permits x to be any real number as parameter θ varies) x = kcos θ or x = ksin θ (which constrains the roots to be between -k and k, so the choice of k is important)...