Carrotsticks' MX2 HSC 2013 Solutions (4 Viewers)

[Carrotsticks]

what i meant was that for c)ii) didnt know how to show AE=.... using triangle ABD. so instead i used a different method where i had to expand sin(a+b). only afterwards did i realise that the next question c) iii) asked us to 'hence show sin(a+b) =sinacosb + sinbcosa.'

So i was wondering how many marks i would lose for using that trig identity.

In that case, probably 2.

 

[superSAIyan2]

In that case, probably 2.

oh damn, i was hoping to get 1 for 'working towards the solution' or w/e the marking criteria usually says

 

[anomalousdecay]

I'm not going to lie, I first thought this too when I did the question.

Great minds think alike.......

lol how did I stuff up like that. I wonder how many people in the state did this.

 

[RealiseNothing]

Great minds think alike.......

lol how did I stuff up like that. I wonder how many people in the state did this.

I'm wondering how many people in the state for question 5 of the multiple choice mistook as

I know my friend did.

 

[anomalousdecay]

I'm wondering how many people in the state for question 5 of the multiple choice mistook as

I know my friend did.

I think that was a decent trick by BOS.

That would have dropped marks for quite a few people.

 

[Makematics]

FK another mistake in volumes :'( will most likely cost me two marks

 

[anomalousdecay]

FK another mistake in volumes :'( will most likely cost me two marks

I got 4e(e^2 - 3) if your wondering. Lost 1 mark.

 

[yasminee96]

I'm wondering how many people in the state for question 5 of the multiple choice mistook as

I know my friend did.

me

 

[Carrotsticks]

I'm wondering how many people in the state for question 5 of the multiple choice mistook as

I know my friend did.

You know, I was ---> <--- close to doing that. Was in automatic gear when doing MC.

 

[RafH]

so...a mark of 58
What would that be scaled to?

 

[anomalousdecay]

Guessing high 80's?

 

[darkness70]

Carrot, for Q10 MC, it's not 4 people has 6 choices. It's 6 people have 4 choices..

 

[RafH]

Guessing high 80's?

so no way i can scrape a 90?
If the markers are generous, i might be able to get 62.

 

[panda15]

so no way i can scrape a 90?
If the markers are generous, i might be able to get 62.

Doubt you will be able to pull off 90. E4 will probably sit around 67.

 

[anomalousdecay]

so no way i can scrape a 90?
If the markers are generous, i might be able to get 62.

You still can. I think this year's paper was about 5- 10 marks harder than last year's.

 

[Web Addict]

Carrotsticks, how did you find this exam compared to previous years?

 

[RealiseNothing]

Carrotsticks, how did you find this exam compared to previous years?

When I asked him, he said he thinks a band 6 cut-off of 65-68.

 

[darkness70]

Last year's probability Q16 was a bitch...

 

[darkness70]

This year I believe the standards of questions 11-15 were harder than previous, but Q16 was about the average difficulty.

 

[Makematics]

Who wants to join my "lost more marks in question 11 than in question 16" crew?

Spewin' really

yep. first i did it in my trial, and again today. fk. it's always Q11.


i think this year's exam was very unique, in that it really favoured the top students, which is why you see people going on about how "half of the ruse and nsb cohort got 100" (im exaggerating, relax). at the same time it really punished rote learners, like the inequality question in Q16 was really quite standard yet it stumped a fair few people.