Mathematics Extension 1 HSC thoughts (1 Viewer)

[idkkdi]

there's no way wtf, what's the point of getting 90 raw mark then

he meant 67/70 = 95.7% lmfao

 

[Daedalus13]

The constant solutions are asymptotes, so your solution cannot be correct.

 

[d1zzyohs]

while lots of people are saying that it was D for the 'it could be 2' question; I genuinely think that the question was worded terribly. 'It could be 2' is literally a non-answer, because then, it could also be 1, and it could also be 3. So in essence, 'it could be 1' and 'it could be 2' are the same answer.
on the other hand, I think I somehow clinched a 80-90 raw while getting 4-6/10 in MC hahaha.

 

[carrotsss]

while lots of people are saying that it was D for the 'it could be 2' question; I genuinely think that the question was worded terribly. 'It could be 2' is literally a non-answer, because then, it could also be 1, and it could also be 3. So in essence, 'it could be 1' and 'it could be 2' are the same answer.
on the other hand, I think I somehow clinched a 80-90 raw while getting 4-6/10 in MC hahaha.

Damn good job!

 

[ExtremelyBoredUser]

while lots of people are saying that it was D for the 'it could be 2' question; I genuinely think that the question was worded terribly. 'It could be 2' is literally a non-answer, because then, it could also be 1, and it could also be 3. So in essence, 'it could be 1' and 'it could be 2' are the same answer.
on the other hand, I think I somehow clinched a 80-90 raw while getting 4-6/10 in MC hahaha.

Same lol, 6 on mc XD

 

[tgone]

in canteen’s solutions, he has stated that the angle for 11. e) is -pi/3. would it also be true that the angle could be 2pi/3 for that?

I don't believe so, Rsinalpha > 0 in the second quadrant

 

[ExtremelyBoredUser]

I don't believe so, Rsinalpha > 0 in the second quadrant

I put 4pi/3 but thats the same thing basically, i think u were supposed to consider negative quadrants. tbf u coulda just done -pi/3 lol

 

[Vall]

I need to stop reading this thread and discovering all the mistakes I made

 

[ExtremelyBoredUser]

I need to stop reading this thread and discovering all the mistakes I made

Bro same but you can't fight that urge, my raw mark be fluctuating and be getting false hopes to be destroyed lifes cruel. its all goods we're most likely copping e4s but still

 

[Leggie]

What did you guys get for k in the volumes question?

 

[ExtremelyBoredUser]

What did you guys get for k in the volumes question?

1

 

[tgone]

I put 4pi/3 but thats the same thing basically, i think u were supposed to consider negative quadrants. tbf u coulda just done -pi/3 lol

I also don't think 4pi/3 is correct? both Rsinalpha and Rcosalpha would be negative in Q3, i think alpha has to be in Q4?

 

[ExtremelyBoredUser]

I also don't think 4pi/3 is correct? both Rsinalpha and Rcosalpha would be negative in Q3, i think alpha has to be in Q4?

oops i mustve meant that then i forgot my answer but i changed quadrant which is what i remember

 

[yanujw]

I need to stop reading this thread and discovering all the mistakes I made

Nothing's worse than being proud of a question you thought you solved in a clever way... then u come to this thread and realised it was horribly wrong lol.

 

[Leggie]

1

Noooooooooooooooooooooooooooooooooooooooooooooooo, I messed it up, GOD no

 

[Vall]

Noooooooooooooooooooooooooooooooooooooooooooooooo, I messed it up, GOD no

ur not alone, I ended getting an unsolvable quadratic (k^2+k+1)

 

[notme123]

Maybe like this:
View attachment 36786

I'm glad they learnt their mistake from last years hsc and had something more straightforward. 12 (a) last year had us draw a particular solution but the slope field was a bit ambiguous so they accepted multiple answers.

 

[notme123]

I notice that notme123's solutions and canteen-2xq's solutions are missing that.

The solutions I posted were also missing 12 e and f as well cuz I accidentally skipped them lol. Don't worry about using them there are multiple errors that i cbb fixing cuz it was handwritten and cant edit easily. canteens solutions are much better (latex ftw)

 

[Canteen]

Here is a slightly edited version of Canteen's solutions with edits by 2xq

Thanks for that, I might properly add the edits in later so it looks more polished

 

[maths4dayz]

It was stupid how they jumped so rapidly; like last year and the 2020 papers were pretty easy and I was aiming for 100% in 3U. I had more trouble with the ext 1 paper than with ext 2. I reckon we should write something to NESA to say if they're gonna drastically increase the difficulty of our exams to at least either up the anti on the content we're learning or make more difficult questions available as practice questions. I reckon with the last two questions, the mean mark will be at or below 10%.