General Thoughts: Mathematics Ext 1 (3 Viewers)

Raolan

Member
Joined
Oct 22, 2012
Messages
77
Gender
Male
HSC
2013
Did anyone not get the induction? It seemed really easy.
 

chriss95

Member
Joined
Mar 3, 2011
Messages
63
Gender
Male
HSC
2012
5 is definitely D. Pair them up, to make 6! ways. Then x by 2! (=2) since C and L can be in any order. Also 11fii) multiples of 4.

For 14biii), I actually found no angles that worked simultaneously for both. Question problem, or what? Test out your values of theta and see if they satisfy both equations
 

Rawf

Member
Joined
May 16, 2012
Messages
715
Gender
Undisclosed
HSC
2012
Idk about most of you..
but I found the test really hard -___- i couldnt do any of question 14 and i didn't get the probability right at ALL...
I got 1MC wrong, didn't know how to draw any of the graphs, got bits wrong here and there (ie. the newtons method & where that equation has a non-zero constant)
overal.. GG no more E4 for me, maybe not even an E3
 

Nws m8

Banned
Joined
Oct 21, 2012
Messages
494
Gender
Male
HSC
2012
Uni Grad
2018
Idk about most of you..
but I found the test really hard -___- i couldnt do any of question 14 and i didn't get the probability right at ALL...
I got 1MC wrong, didn't know how to draw any of the graphs, got bits wrong here and there (ie. the newtons method & where that equation has a non-zero constant)
overal.. GG no more E4 for me, maybe not even an E3
awww dw mate, just hope the cut off for E4 falls to around 40 XD
 

nucgaek

Member
Joined
Oct 5, 2011
Messages
68
Gender
Male
HSC
2012
For 14biii), I actually found no angles that worked simultaneously for both. Question problem, or what? Test out your values of theta and see if they satisfy both equations
I got an answer which corresponded with others, it was somewhere around 70-80 degrees
 

Nws m8

Banned
Joined
Oct 21, 2012
Messages
494
Gender
Male
HSC
2012
Uni Grad
2018
what did youse do for Q.13) c) ii)
 

Rawf

Member
Joined
May 16, 2012
Messages
715
Gender
Undisclosed
HSC
2012
awww dw mate, just hope the cut off for E4 falls to around 40 XD
Seeing everyone found it easy I don't think so :(
I only got 40/70 for trials lmao and I'm feeling worse now than how I felt during trials... so my mark might be even lower
 

RishBonjour

Well-Known Member
Joined
Aug 14, 2011
Messages
1,261
Gender
Male
HSC
2012
ATLEAST 20-30 people will get a 100

edit:
i think wayyy more than that actually.

Didn't get the 2 mark circle geo + think I lost 1 mark in projectile part iii (fml) (and I'm SHIT at 3u)

hopefully no sillies.
 
Last edited:

Nws m8

Banned
Joined
Oct 21, 2012
Messages
494
Gender
Male
HSC
2012
Uni Grad
2018
seeing everyone found it easy i don't think so :(
i only got 40/70 for trials lmao and i'm feeling worse now than how i felt during trials... So my mark might be even lower
kill chem !
 

nucgaek

Member
Joined
Oct 5, 2011
Messages
68
Gender
Male
HSC
2012
Any chance of taking marks off for abbreviating "simple harmonic motion" to SHM?

EDIT: Wrong question. I didn't get c(ii)
You have to take 0.3 away from C(T) to find a new polynomial/equation, which you then use to estimate, so you get 22.something
 

GoldyOrNugget

Señor Member
Joined
Jul 14, 2012
Messages
583
Gender
Male
HSC
2012
t = 1.511s. Subbed it in, it works. I'm gonna kick myself if there's a smaller solution.
 

Rawf

Member
Joined
May 16, 2012
Messages
715
Gender
Undisclosed
HSC
2012
what did youse do for Q.13) c) ii)
you change the equation into Rcos(nt-whatever) = -5
then you work it out. I got 1.5 seconds or something like that (i probably solved it wrong knowing myself)
 

Raolan

Member
Joined
Oct 22, 2012
Messages
77
Gender
Male
HSC
2013
Any chance of taking marks off for abbreviating "simple harmonic motion" to SHM?



You have to take 0.3 away from C(T) to find a new polynomial/equation, which you then use to estimate, so you get 22.something
Depends on the context. If it's obvious you're talking about simple harmonic motion I doubt it.
Given you're saying "therefore the particle is moving in SHM" I'm sure you'll be fine.
 

Timske

Sequential
Joined
Nov 23, 2011
Messages
794
Gender
Male
HSC
2012
Uni Grad
2016
Any chance of taking marks off for abbreviating "simple harmonic motion" to SHM?



You have to take 0.3 away from C(T) to find a new polynomial/equation, which you then use to estimate, so you get 22.something
Yeah thats what i got 22.7
 

Users Who Are Viewing This Thread (Users: 0, Guests: 3)

Top