Maths Ext 2 Predictions (15 Viewers)

[Trebla]

Fizzysoda emailed a few years back to clarify. Planes, Octets, Cross Product are all OOS.

That just means that you are not required to recall conceptual content specific to planes. However, it doesn't mean that it is ruled out from the "application" side of the syllabus.

It is possible for an exam question to guide you into doing a vectors question on planes by derivation. For example, given vectors parallel and perpendicular to the plane, they may ask you to derive the Cartesian equation of a plane. Technically, you are just using tools you already know within the syllabus (i.e. the dot product) and just applying it to an unseen problem. However, they cannot ask you to quote the equation of a plane upfront, because that is not explicitly in the syllabus.

Another example is repeated factors in partial fractions. Technically, it is not in syllabus but that never stopped it occasionally appearing in the HSC exams. This is because the exam question must tell you the structure of the partial fractions for repeated factors and you need to be guided into deriving it by using tools that are within syllabus. However, you are not expected to recall the structure of partial fractions when there are repeated factors, because that is outside the syllabus.

 

[tywebb]

certain current textbooks that try to treat it actually do it wrong.

lets be clear about this. the books are maths in focus and new senior mathematics.

and i go further the books have hunter/green, fitzpatrick/aus names on them, but they are not all to blame.

fitzpatrick passed away in 2008 and hunter has said all the mechanics part of the mif was all by green.

now we can narrow the blame down further to just green and aus.

 

[Dontcallmedude]

If there is a resisted projectile motion question I am screwed. I get generally around 74-81 on 2024 school past papers and have yet to see a resisted projectile motion question. If there is one I'm going to be so surprised you will know it's me if you see me in the exam hall. My jaw will be effected by gravity and 1000000v^10000000

 

[Dontcallmedude]

Even eddy woo has the wrong method on YouTube I believe.

 

[tywebb]

Even eddy woo has the wrong method on YouTube I believe.

yeah that didn't help

but what is worse than a mere mistake is that they were all told it is wrong, but stubbornly ignored that advice

brailey sims, a professor from newcastle uni and steve howard, a textbook author and hsc marker, both teamed up and exposed the flaw, and eventually even nesa changed the syllabus accordingly - and they still stubbornly refuse to acknowledge the error.

so all we can do is continue to expose the error and increase awareness of it

 

[OD6]

What do you guys think will be the focusses in the later/ more difficult parts of q14/15? Most of the time I struggle to complete most of q16 (though I am able to get some marks from a few questions often without solving them). I just got a 60 raw mark on the 2022 hsc paper, and would like to bump that up a little and give myself a shot at an e4, and I think those harder questions in the middle of the paper will likely be how that is determined.

Also, with that kind of mark, how likely is it that I can get an e4? I'm just hoping there aren't too many weird vectors/mechanics questions

 

[K1uggie]

What do you guys think will be the focusses in the later/ more difficult parts of q14/15? Most of the time I struggle to complete most of q16 (though I am able to get some marks from a few questions often without solving them). I just got a 60 raw mark on the 2022 hsc paper, and would like to bump that up a little and give myself a shot at an e4, and I think those harder questions in the middle of the paper will likely be how that is determined.

Also, with that kind of mark, how likely is it that I can get an e4? I'm just hoping there aren't too many weird vectors/mechanics questions

Thats almost a B6:

Year	Raw Mark (/100)	Aligned Mark (/100)	Band

2022	84	96	E4
2022	76	94	E4
2022	67	91	E4
2022	65	91	E4
2022	51	80	E3
2022	50	79	E3

 

[user1207]

is implicit differentiation oos

 

[daddywal]

Hi, I want to know if its possible for me to get 97+ scaled in 4u this year. The reason I ask this is because the tests are getting harder each year and that just makes me certain regarding my ability to perform in the exam. These are my results in past HSC papers I have done:
2020 - 96
2021 - 80
2022 - 83
2023 -83

 

[C2H6O]

Hi, I want to know if its possible for me to get 97+ scaled in 4u this year. The reason I ask this is because the tests are getting harder each year and that just makes me certain regarding my ability to perform in the exam. These are my results in past HSC papers I have done:
2020 - 96
2021 - 80
2022 - 83
2023 -83

DAMN that's good. It depends on the difficulty of the exam, but I'd think you're close to a 97. Check rawmarks.info they have raw hsc marks from past years and what they scaled to. According to their data (not 100% accurate), you would've got 97+ in 2020 and 2023

 

[K2Trappy]

i think so if you can make sure you drop almost no marks in questions 11-15, so that if you flunk multi choice and 16 you can still have the possibility of a score of 70-75 and an E4

bruh I start dropping marks at 13 idk what u talking bout full from 11-15

 

[K2Trappy]

occasional mark drops at 12 as well and if the day is not good 11 also happens

 

[K2Trappy]

i accept my fate to maths, who wants an e4 anyway?

 

[K2Trappy]

is projectile with k components possible to come? I've tried to find it but it just doesn't exist on any hsc paper but I've seen a few on trials

 

[Armon]

That just means that you are not required to recall conceptual content specific to planes. However, it doesn't mean that it is ruled out from the "application" side of the syllabus.

It is possible for an exam question to guide you into doing a vectors question on planes by derivation. For example, given vectors parallel and perpendicular to the plane, they may ask you to derive the Cartesian equation of a plane. Technically, you are just using tools you already know within the syllabus (i.e. the dot product) and just applying it to an unseen problem. However, they cannot ask you to quote the equation of a plane upfront, because that is not explicitly in the syllabus.

Another example is repeated factors in partial fractions. Technically, it is not in syllabus but that never stopped it occasionally appearing in the HSC exams. This is because the exam question must tell you the structure of the partial fractions for repeated factors and you need to be guided into deriving it by using tools that are within syllabus. However, you are not expected to recall the structure of partial fractions when there are repeated factors, because that is outside the syllabus.

What the word "plane" even means is is not in syllabus, so unless its heavily scaffolded your suggestion that they derive the cartesian equation of the plane through the point normal form is silly. Unless they explicitly give you the formula n.(x-a) = 0 lmao.

 

[Hejjwheh23]

bruh I start dropping marks at 13 idk what u talking bout full from 11-15

Ahaha, exactly, that's facts.

 

[Armon]

Hi, I want to know if its possible for me to get 97+ scaled in 4u this year. The reason I ask this is because the tests are getting harder each year and that just makes me certain regarding my ability to perform in the exam. These are my results in past HSC papers I have done:
2020 - 96
2021 - 80
2022 - 83
2023 -83

Nah more around a 95-6ish than 97 with those raws. Plus you have to account for there being mores stress in the exam

 

[user1207]

occasional mark drops at 12 as well and if the day is not good 11 also happens

it happens, not the end of the world

 

[Armon]

Is not doing question 16 a conceivable strategy

Universal 4u experience. In all seriousness, still look at the qs! You might be surprised that some of the questions are way simpler than you'd think. I got more marks in q16 than in q15 in my year

 

[K2Trappy]

Is not doing question 16 a conceivable strategy

a lot of the times there are free 3ish marks on 16 for like subbing in numbers so don't just not even look at it but yh I leave some of it unattempted id rather make sure I didn't do anything stupid on 11-13 and do some harder 14-15 then just waste and prob still get 0 for 16