Maths Ext 2 Predictions (2 Viewers)

[K2Trappy]

im on my knees for an e4 currently

 

[Dontcallmedude]

Ruse, north Sydney boys, north Sydney girls. Probably skip north syd girls. It's so different It's prolly not worth it

 

[Trebla]

Any chance you have worked solutions for this? How fo you find the two perpendicular vectors with the given information?

This is from the BoS trials 2024, see

BoS Trials Maths and Business Studies 2024

Here's my attempt. I've probably over-complicated it or am just plain wrong: Base case (n=0) – Trivial Inductive hypothesis – Assume true for some non-negative integer k: \text{i.e. } \exists p, q \in \mathbb{Z} : w_{2k} = 11 p \rightarrow u_{2k} = 11q \qquad (1) Inductive step – RTP true...

boredofstudies.org

 

[ringading]

how many calculators are we bringing

 

[I Love maths So much]

4

 

[ringading]

4

HELP i thought 3 was enough. damn u rich to buy that many

 

[Hejjwheh23]

Nice to see everyone is active on the day before the exam

View attachment 45049

I got this question in one of my school's past papers... No clue how to do any of it, so if it comes up in the exam tmr I'm cooked

I attempted this, not 100% confident tho.

 

[OD6]

I've done the 2022 and 2021 hsc papers over the last couple of days and got a 60 and a 65, aligning to around 88-89, so just below an e4.

I would love to get up to an e4 but idk how to go about it. Should I focus on perfecting q11-14 or answering more of q15-16? for context I'm usually at or close to full marks for 11 and 12, around 8-12/15 for q13 and 14 and q15-16 varies a bit, mostly around 4-6/15. Also, how do you guys judge when to move on from a question? A couple of times in these papers I have made a small mistake/oversight on a question (usually a proof or something where I can double check my answer) and then gotten stuck trying to work out what I did wrong to no avail.

Is it worth my time to go after more marks in q15/16, or should I not worry about it and maximise what i get in the easier questions

 

[Hejjwheh23]

Ignore the shading, Im not sure If im headed on the right track or not tho for this one aswell

 

[ringading]

I've done the 2022 and 2021 hsc papers over the last couple of days and got a 60 and a 65, aligning to around 88-89, so just below an e4.

I would love to get up to an e4 but idk how to go about it. Should I focus on perfecting q11-14 or answering more of q15-16? for context I'm usually at or close to full marks for 11 and 12, around 8-12/15 for q13 and 14 and q15-16 varies a bit, mostly around 4-6/15. Also, how do you guys judge when to move on from a question? A couple of times in these papers I have made a small mistake/oversight on a question (usually a proof or something where I can double check my answer) and then gotten stuck trying to work out what I did wrong to no avail.

Is it worth my time to go after more marks in q15/16, or should I not worry about it and maximise what i get in the easier questions

same i get around that too lol atp i just maximise the amount of marks i can get, though I'm sure it'll look better if u can get decent in e4 style questions

since it is tomorrow, maybe reviewing the topics you cant do well? cause in the exam you can be like oh i saw this yesterday and attempt it (attempts always get at least 1 if you write the right stuff) my teacher also said even if you cant do it there's possibility of just writing the steps you were going to do or what your thinking of how to solve it and can get a mark cause hsc markers are always trying to give out marks. if your getting high marks for q 11 and 12s but not full marks they're most likely silly mistakes. in the exam just go by the exam of what you can - you have the liberty to start anywhere cause of the different booklets. maybe starting with 11 and 12 for the easy marks you can get and make sure you don't rush cause whats the point of rushing and losing marks or losing time and not doing the questions you probably wont be able to solve yk?

i suggest practicing q13 and 14 to try and maximise those marks too - maybe also look at q15 and 16 (sometimes they have some questions for easy marks which u can maximise and get as many marks as u can)

whenever i do exams i try and attempt it and think of different ways i can solve it, attempt it each time (try not crossing out even if u think its wrong) just leave it there until you def know how to do it and write it). i generally move on when i absolutely lost hope and cannot figure it out and ill just come back to it later (i highlight it and maybe at the end of the exam i might think of smt and just write it down. it has worked b4)

 

[epicmaths]

im prob very wrong but for ii could u use one of the points on either line, and have the difference of direction vectors be the resultant direction? or have any point on both lines and just have that difference as the direction vector?

There are two ways I know about in finding the equation of a plane:
1. The dot product between a perpendicular vector and a vector between (x y z) and the foot of that perpendicular should be 0. Not suitable for this question.
2. If you already have two lines on that plane, then any point can be found by a linear combination of the direction vector of both lines, starting from their intersection point as the "centre" of the plane. At uni they call the two non-parallel vectors the basis (not necessarily at right angles (orthogonal)) of the plane.

In your question, the equation of the plane will be:
line 1 r= (2 03) + λ (1 -1 2)
line 2 r= (2 -1 4) + λ(2 -1 3)
Find find where they meet; say (a b c)
Then the equation of all points on that plane can b e given by (x y z) = (a b c) + lamba1 (1 -1 2) +lamba2 (2 -1 3)

I think really anyone of the other given points can be used in place of (a b c) as your choice of "centre" of plane is arbitrary as long as its on the plane.
Looks gross though!

 

[user1207]

HELP i thought 3 was enough. damn u rich to buy that many

stop im bringing 2 i lost my 3rd one

 

[zachyboi525]

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

Give up on it. Just dropped 99 on the 2021 paper

 

[user1207]

what are these type of questions called and what's the general method for them i've only done it a few time but forgot

 

[zachyboi525]

what are these type of questions called and what's the general method for them i've only done it a few time but forgot View attachment 45068

It's called integration. Just use u sub

 

[ringading]

stop im bringing 2 i lost my 3rd one

2 is better than non

 

[K2Trappy]

what are these type of questions called and what's the general method for them i've only done it a few time but forgot View attachment 45068

u = a-x sub

 

[user1207]

u = a-x sub

did that but i think i either messed up or got stuck at a step cause i didnt get the answer C like they wanted

 

[user1207]

NVM I GOT IT I JUST WROTE ONE THING WRONG deadass thought i was going insane

 

[K2Trappy]

NVM I GOT IT I JUST WROTE ONE THING WRONG deadass thought i was going insane

don't stress its one mark mc question at best