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Well, time to look through the paper and this discussion to taunt myself about questions that I got wrong.

I have... bad news for you. The initial writing booklets for math are always 3 pages only. And this paper will probably need more extra booklets than ext 2 because of the graphing questions - which I anticipate there will be quite a bit of this year.

I calculated 99.72%. You need to use the complementary probability that none of the sample has sample proportion < 0.22

Wasn't that the usual video they get some poor hs student to go through (this year it was Prairiewood HS I think). Jeez... that's embarassing for that person. Looks like now they've now gone straight to a JR student for the (correct) answer...

Same lol it took me by surprise when I first saw it, thinking about how it looked really similar

I'm not convinced this works. If you assume this is true and divide by z1z2z3 for example, you get 1/z1 + 1/z2 + 1/z3 = 1/z1z2z3. RHS has a modulus of 1 while the LHS has 3 terms of modulus 1. Although, maybe that is a hint in solving the equation, so feel free to correct me if I'm wrong.

I wasn't too surprised, they have to make Q11 accessible for everyone and it wasn't super blatantly easy. But haha the inequalities were a joke - the blatant inequality in 12a that year 10 students can do, and the application of inequalities in 16c were pretty straightforward and helped me to...

Thoughts and feelings? You should've called this thread 'thoughts and prayers'

I had remembered it incorrectly. According to the paper you had to find ALL solutions to that triplet of conditions.

Question 15; Someone has posted the first part above already Part (b) -> A piston is moving in SHM with a centre displacement of 0.15m and a minimum displacement of 0.03cm (cant remember the figure correctly). If the piston is 0.8kg, and completes 40 full motions per second, what is the...

Breakdown of Q16 for those wondering who did not do the exam. Part (a) -> three complex numbers, which are the vertices of an equilateral triangle lie on the perimeter of a square with edges (-5,-5), (5,-5), (5,5) and (-5,5) in the Argand diagram. If one complex number is at 5 + i, find the...

My final predictions for tomorrow's exam; 1. A purely geometric proof 2. A vector question testing spheres/planes 3. They will go easy on SHM and it will be quite low marks/early in the test. 4. Last question will be some identity or inequality through complex numbers Disclaimer: All...

I think they're going to test a geometrically-derived inequality this year. It's quite obscure but nonetheless a part of the syllabus and makes for some unique questions.

And yet the statement you have just written is phrased as an inequality. That's beautifully ironic.

Hahaha seriously fr. Whenever i see anything beyond proving x^2 + y^2 > 2xy my brain goes to mush.

I hope so. Or at least I hope for more interesting and extended questions.

I believe it will be applying complex numbers in order to derive some ridiculous inequality/identity/exact value of a trig ratio.

Hi all, I am trying to get an accurate idea of what my moderated internal mark may be for english advanced. School rank: ~150 through the years My internal rank: 19/60 Past school data for the subject: 2021: 3 Band 6s, 62% in Band 5 and 6, Average HSC mark = 81 2020: 2 Band 6s, 68% in Band 5...

Infinity/Infinity is not the appropriate way to find limits, you need to consider dominance laws. Exponentials dominate algebraic terms which dominates logarithms. And the dominant factor is the one that dictates how the function behaves as x approaches infinity.

I wonder why they had included the image of the scholar speaking to the camera for LFR. Was that something you guys analysed visually for your analysis? Or did they just put it to orient students into what scene the dialogue was from?