Search results

Not sure how you can justify that assumption? The question is asking IF the distance (from particle's current position to its projection point) is always increasing then what restrictions apply to the launch angle.

After applying the substitution you should get \dfrac{2}{3}\displaystyle\int_0^{\infty} e^{-\frac{u^2}{2}}\,du Now recall that the standard normal probability density function is f(x)=\dfrac{1}{\sqrt{2\pi}}e^{-\frac{x^2}{2}}\,dx Hence...

I have also marked Q13 for Maths Ext1 and have some feedback for a)ii). A common response to this question was that since f’(x) > g’(x) for x > 0 then therefore f(x) > g(x) in that same domain. This is insufficient because the result does not hold more generally. A trivial example to illustrate...

Also, what do you know....a similar question as above appeared in the HSC Maths Ext 2 paper - but with more guidance so it was not as easy to make the above mentioned error.

Aiming for tomorrow. In the meantime, feel free to ask any specific questions here if you want some answers.

Specialist Mathematics in VCE actually goes further than the HSC courses in certain parts of Mechanics (e.g. momentum) and Statistics (e.g. hypothesis testing). The real distinguishing feature of the HSC course is the Nature of Proof topic (and maybe circle geometry as well but that's no longer...

Not gonna lie, I find the gm expression in Q16 really odd. As if not write mg... At least the reduction formula question was better than the ones they've had in previous years

hmm Q16b)i) and ii) was similar to this year's BoS trials...

From https://www.smh.com.au/national/nsw/one-of-the-hardest-exams-i-ve-come-across-new-maths-common-content-splits-hsc-students-20201026-p568qs.html Do you agree?

You guys aren’t allowed to keep the question paper?

Just marked Q12 of Maths Ext1 and have some feedback on Q12e)i) The question asked students to prove a given vector relationship between A, B and P given that \dfrac{AP}{BP}=\dfrac{1-\mu}{\mu}\quad 0<\mu<1 A very common response from students was to assert that...

Not yet. Maths is taking priority at this stage as their exams are sooner. Chemistry should be out around a week after.

The direction in which you resolve the forces is not horizontal/vertical. It is parallel/perpendicular to the inclined surface. This is because the net force of the object is parallel to the inclined surface.

Unlikely going to happen because the syllabus only covers integration over real numbers. You start to run into rigour issues (e.g. how do you account for the fact that ordering does not exist for complex numbers like it does for real numbers?) that need to be established first when integrating...

Not sure how an integration question with a given substitution can really separate those studied vs those who haven’t?

This is not technically correct. Aligning (for your HSC - and have nothing to do with the ATAR) and scaling (for your ATAR) are completely independent processes applied to the same raw mark. See the flowchart in the thread below...

I reckon Q16a) is probably as challenging as you can get when it comes to resisted projectile motion, mainly because a sneaky trick is needed to get part (ii) out, otherwise you're going to be stuck. Most textbook or past exam questions (of which there are very few) are far more straightforward.

💥 Here are the solutions and student results for the 2020 Mathematics Extension 2 BoS trials. Thanks to everyone who participated and for your patience! A reminder that whilst the questions are made to be as closely styled to the HSC exams as possible, this is NOT intended to be an accurate...

See flowchart in thread https://www.boredofstudies.org/threads/flowchart-of-how-hsc-marks-and-atar-are-determined.390261/

Maths Ext2 results and solutions will be released tonight...