Maths Ext 2 Predictions/Thoughts (1 Viewer)

[Trebla]

I was talking about the mechanics question lol

 

[Siwel]

oh , ye nah.
hsc isn't that mean.

i was gonna say just completely ignored their arctanx and its a show that q was about to fume..., the feeling of realising something so stupid after the exam

 

[Siwel]

If you download the Extension 1 and 2 syllabuses and search for the work arctan, all that pops up is "not found".

Could be a problem.

What? That sounds even more complicated. Can you draw it rather than me trying to interpret your comments and then drawing it wrong.

look i can but its gonna be on a paint.net kinda thing soooo its gonna be kinda shocking

 

[idkkdi]

What? That sounds even more complicated. Can you draw it rather than me interpreting your comments and then drawing it wrong?

use siwei's mine was missing lines.

 

[Siwel]

 

[vishnay]

iirc
View attachment 33779

nice circle

 

[Siwel]

iirc
View attachment 33779

yeah take his way better lol

 

[idkkdi]

nice circle

pretty good mouse circle considering the size ngl

 

[vishnay]

pretty good mouse circle considering the size ngl

i wasnt being sarcastic

 

[idkkdi]

View attachment 33780

wait this is more correct.
it was 20 lines iirc.
I'm missing a few lines.

 

[Siwel]

wait this is more correct.
it was 20 lines iirc.
I'm missing a few lines.

yeah all ik is when you choose a point go 4 between and eventually you end up the same spot

 

[Siwel]

wait this is more correct.
it was 20 lines iirc.
I'm missing a few lines.

what you reckon the hardest question in that exam?

 

[idkkdi]

what you reckon the hardest question in that exam?

perhaps the very last one.

any more thinking about that 4u test gonna give me depression. cya.

 

[Siwel]

If that is the case then the answer is like this:
View attachment 33782

Was there something a bit more specific about the modulus of a+ib in the question?

nope nothing more, just guessed honestly had no clue how to do without numbers, except mod>1 obv

 

[Siwel]

would you think mark for realising 4 lines between answers?

 

[imaiyuki]

Well assuming the reconstruction is approximately correct now, it is clear firstly that the argument of the first root is a quarter that of a+ib.

Secondly that the roots are equally spaced, hence on the lines perpendicular to each other.

Thirdly that the moduli of the roots are smaller than that of a+ib, but still greater than 1.

Fourthly that since a+ib is not a real number then the roots do not occur as conjugate pairs.

Not sure how the marks would be allocated though since it is just a 2 mark question.

This is why I wanted to know more about the modulus of a+ib. If there was something more specific about that, then maybe there might be a mark associated with that too.

i had to use my ruler to measure but it was exactly modulus 7/5 from origin, so i made all my four roots roughly (7/5)^(1/4) just to be safe, so just outside the unit circle
honestly idk if nesa were just being sneaky with making the modulus not 1

 

[Jojofelyx]

Surely its not just me whose reading this and cringing. Seems like everyones out here getting like 90 raws whilst im stuck with my poopy 60s/low 70s xD.

The only comfort im getting is the ability to do this again next year if it does go bum bum. Long story short, HSC is shitty

Regardless, good luck for x1 yall, they're prolly gonna be like last year, x1 harder than x2. So all of you getting raw 90s in x2 better watch out !

 

[CM_Tutor]

full marks?
I'm getting a solid 1 maybe.

View attachment 33778
this is the graph btw

With this graph of , I wonder how many sketches noted that there should be an open circle at the origin and a closed circle at .

 

[notme123]

i think i lost at least 5 marks from silly mistakes (easy marks lost. not the only ones i lost obviously):
13b if you do trig sub (yes it works i did it again) you get a factor of 243 out the front. i forgot to carry this through so carried error, 1 mark
14a 4-x^2 = (4-x)(4+x). enough said, 1 mark
14bii forgot to write to 1 dp, 1 mark
15bii dont know if this is a mistake but after my expression which i know is correct, i forgot to write meters
16c forgot to label axes re(z) and im(z), also shading was a bit off.

 

[tito981]

ive lost like 12 marks definite, probs aiming for like 85ish. I hope scaling is like 2013.