General Thoughts: Mathematics Extension 2 (2 Viewers)

Joined
Oct 10, 2011
Messages
81
Location
Home
Gender
Male
HSC
2011
anyone gonna write up some solutions, really wanna see how Q8s done, cause for b, i did a shit load of working, that it can be "obviously deduced" that the inequalities are correct, and had like massive fudges haha
Q1:13-14 integration very easy, but made silly mistake in partial fractions, -___- anyone know if i'll get a mark for equating the coeficents and stuff, tbh idk how that partial fraction was done..anyone?
Q2: 15 :D
Q3: 13 -___- wrote pi/2, instead of 2/pi for the limit, the e--> infinity wrote it becomes a rectangular hyperbola tehehhe (silly, cause they have e=sqrt(2)) haha
Q4: 9-11 :( tangent Q, didn't realise how easy c ii) was -__-
Q5: 8 :( no clue what reflection property was
Q6: 9 - fk jac and jill
Q7: 10 - I?
Q8: 3-8 - depnding how good my 8b fundge was :p didn't realise it was easy probability :(

so total of: 80 ~ 83
:'( thought i;d get a band 6 in ext 2...not anymore
 

D94

New Member
Joined
Oct 5, 2011
Messages
4,423
Gender
Male
HSC
N/A
I reckon I'm sitting on 100/120, hopefully no other stupid mistakes. Not a bad test, imo.
 

silence--

Member
Joined
Apr 16, 2009
Messages
246
Gender
Male
HSC
2011
idk

i agree with mirakon/whoever else said that the problem was time.

fucking question 3 took like ages, where are all the easy 1 mark graphing questions :/

got like max of 8/15 for q8 (if im lucky)

also i screwed up some easy questions like finding I and shading the wrong region for the locus (fucking lol)

argh.
idk.

at least its over now.
 

failwhale

Member
Joined
Jul 19, 2010
Messages
147
Gender
Male
HSC
2011
Re: paper

that fucking mech question where u had prove something about halving the speed. WTF???? and question 8..... well i was really close to part a) rest i didn't have enough time
 

02oxygen

New Member
Joined
Oct 18, 2011
Messages
1
Gender
Undisclosed
HSC
2011
wow you guys all found it relatively easy?? i did so bad compared to you all..
my hsc is fucked.. but yea it wasnt that hard. just found some question hard.
 

Pave

New Member
Joined
Mar 2, 2011
Messages
3
Gender
Undisclosed
HSC
2011
Re: paper

To make all you guys feel better, I personally felt progressively drained as I worked. q7 and 8 share approx 9 marks earned between them, so im hoping for about 85.

Good luck with your results. not point curling up into a ball in depression... we got ext1 to do!. :D
 

timting95

Member
Joined
Sep 18, 2010
Messages
45
Gender
Male
HSC
2011
Re: paper

to make all you guys feel better, i personally felt progressively drained as i worked. Q7 and 8 share approx 9 marks earned between them, so im hoping for about 85.

Good luck with your results. Not point curling up into a ball in depression... We got ext1 to do!. :d
agreed!!!
 

brettymaccc

Member
Joined
Jul 4, 2011
Messages
129
Gender
Male
HSC
2011
anyone gonna write up some solutions, really wanna see how Q8s done, cause for b, i did a shit load of working, that it can be "obviously deduced" that the inequalities are correct, and had like massive fudges haha
Q1:13-14 integration very easy, but made silly mistake in partial fractions, -___- anyone know if i'll get a mark for equating the coeficents and stuff, tbh idk how that partial fraction was done..anyone?
Q2: 15 :D
Q3: 13 -___- wrote pi/2, instead of 2/pi for the limit, the e--> infinity wrote it becomes a rectangular hyperbola tehehhe (silly, cause they have e=sqrt(2)) haha
Q4: 9-11 :( tangent Q, didn't realise how easy c ii) was -__-
Q5: 8 :( no clue what reflection property was
Q6: 9 - fk jac and jill
Q7: 10 - I?
Q8: 3-8 - depnding how good my 8b fundge was :p didn't realise it was easy probability :(

so total of: 80 ~ 83
:'( thought i;d get a band 6 in ext 2...not anymore
The confusing partial fractions meant you had to get a common denominator with the first two fractions (a/x and b/x^2) of x^2, then simplify the top. So, ax + b/x^2. Then the rest is normal.
 

BobMac

Member
Joined
Mar 16, 2011
Messages
90
Gender
Male
HSC
2011
The confusing partial fractions meant you had to get a common denominator with the first two fractions (a/x and b/x^2) of x^2, then simplify the top. So, ax + b/x^2. Then the rest is normal.
It could have been done another way.
1/(x-1) - 1/x - 1/x^2
 

D94

New Member
Joined
Oct 5, 2011
Messages
4,423
Gender
Male
HSC
N/A
The confusing partial fractions meant you had to get a common denominator with the first two fractions (a/x and b/x^2) of x^2, then simplify the top. So, ax + b/x^2. Then the rest is normal.
Erhh...they set it up for you already, so you just needed to do it normally. Combining the first two fractions is unnecessary.

I guess the only way one would think it was confusing, is if they hadn't learned the repeated factors rule/method (but not required by the syllabus).
 

D94

New Member
Joined
Oct 5, 2011
Messages
4,423
Gender
Male
HSC
N/A
After that jac and cunting gil question, you guys are talking about the partial fractions q?!
The first two parts were pretty easy (or should I say common if you did Cambridge questions) for the resisted motion; I got part of the last part, but just moved on when I got nowhere with it.
 

cheezcake

Callipygian Member
Joined
Mar 14, 2010
Messages
596
Location
Gliese 581 d
Gender
Male
HSC
2011
The first two parts were pretty easy (or should I say common if you did Cambridge questions) for the resisted motion; I got part of the last part, but just moved on when I got nowhere with it.
As if, the first and last part was easy i didnt get anywhere with the second though :(
 

brettymaccc

Member
Joined
Jul 4, 2011
Messages
129
Gender
Male
HSC
2011
Erhh...they set it up for you already, so you just needed to do it normally. Combining the first two fractions is unnecessary.

I guess the only way one would think it was confusing, is if they hadn't learned the repeated factors rule/method (but not required by the syllabus).
Well done, but I didn't learn content outside of the syllabus, so I did it the easier way of just getting a common denominator.
 

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

Top