General Thoughts: Mathematics Ext 2 (2 Viewers)

Stressmasta

New Member
Joined
Oct 17, 2012
Messages
1
Gender
Undisclosed
HSC
2012
im pretty sure i failed the exam :( ...can anyone approximate what 45% will scale up/down to?
 

chriss95

Member
Joined
Mar 3, 2011
Messages
63
Gender
Male
HSC
2012
^
15b)
i) real coefficients - roots in conjugates
II) just factorise
ii) for there to be a real root, z-k=0 and kz-1=0 simultaneously. therefore, k = 1 or -1; sub this value in
iv) product of roots; modulus^4 = 1. and they all have equal modulus. therefore = 1
v) use sum of roots
vi) no idea

EDIT: with vi), i had an idea, but not enough time. sum of roots two at a time would give you a value of k^2. you would then use the fact that k=x-y to prove it is greater than something; and it should fall out somehow
 
Last edited:

YoYoWayne

Member
Joined
Oct 26, 2011
Messages
76
Location
Dee Why
Gender
Male
HSC
2012
Uni Grad
2017
Shit it was sooooo hard for me T.T
Anyone know how will a 80% raw will be alligned? what about 85% ?
 

nightweaver066

Well-Known Member
Joined
Jul 7, 2010
Messages
1,585
Gender
Male
HSC
2012
Think i'll be happy with my mark :)

Wasn't a very hard paper nor was it easy. Decent paper overall.
 

Riaa

Member
Joined
Nov 19, 2011
Messages
94
Location
Sydney :)
Gender
Female
HSC
2012
Yeah, it was easier than previous years in my opinion.
Although, i wanted more mechanics questions (my strongest topic).

I thought multiply choice would be a killer like it was in trials so glad it wasn't.
Still multiply choice should be banned in all levels of maths...in my opinion LOL
 

kliro_10

New Member
Joined
May 28, 2011
Messages
11
Gender
Male
HSC
2012
i found it alright. there was too much conics and geometry imo and nowhere near enough mechanics. volumes by far hardest question. multiple choice was good but theres nowhere near enough structure with this change to multiple choice. last question wasnt too bad but 15a was challenging.

anyone able to tell me what 75-83 may scale to?
 

choiyokbao

Member
Joined
May 29, 2011
Messages
105
Gender
Male
HSC
2012
decent paper, different format a bit weird but meh, too late to do anything now XD
 

deswa1

Well-Known Member
Joined
Jul 12, 2011
Messages
2,256
Gender
Male
HSC
2012
Solid paper. I confirmed dropped 13 marks so hoping for 85/100 though I could get heaps below that with sillies and stuff lol.

I think at the start I was too careful and slow- my setting out for Q11 is beautiful etc. I tried to be careful with restrictions but I probs missed some of those as well.
 

Raolan

Member
Joined
Oct 22, 2012
Messages
77
Gender
Male
HSC
2013
there were two questions on Mechanics bro, dafuq u on abouT?
There was one mark in the multiple choice.

The other wasn't Mechanics, it was 3 unit, unless you want to classify 3 unit applications under mechanics.
 

hipoppo23

New Member
Joined
Oct 21, 2012
Messages
2
Gender
Male
HSC
2012
Lost all the marks on geometry. Rest were good, Q16 c i) took me a while lol
 

Users Who Are Viewing This Thread (Users: 0, Guests: 2)

Top