Carrotsticks' Solutions 2015 Extension 2 HSC (2 Viewers)

[obliviousninja]

looks like i state ranked

 

[Librah]

for 16aiii shouldn't it be b(n)= (nq q)=(nq)!/(nq-q)!q!

 

[WhoStanLeee]

Sorry my copy is missing Q11 and Q15 b) and c)

 

[tywebb]

Sorry my copy is missing Q11 and Q15 b) and c)

Indeed it is.

Here are Q11 and Q15 b and c which I extracted from beanbean's version:

 

[Drsoccerball]

lel i integrated one side of the square....Cylindric shell I made a mistake...Baloon question made a mistake....Pn i lost both marks... (-1)^n lost 1 mark and last question lost 2 marks... sucks

 

[Carrotsticks]

for 16aiii shouldn't it be b(n)= (nq q)=(nq)!/(nq-q)!q!

Cheers, fixed it.

 

[WhoStanLeee]

Unfortunately Carrotsticks will lose marks for not drawing all complex numbers on the same half-page Argand diagram.

 

[Carrotsticks]

Unfortunately Carrotsticks will lose marks for not drawing all complex numbers on the same half-page Argand diagram.

Good grief I did not see that. Will change that now.

 

[obliviousninja]

Unfortunately Carrotsticks will lose marks for not drawing all complex numbers on the same half-page Argand diagram.

LOL

 

[camdaman12]

lel i integrated one side of the square....Cylindric shell I made a mistake...Baloon question made a mistake....Pn i lost both marks... (-1)^n lost 1 mark and last question lost 2 marks... sucks

omfg i integrated one side of the square too LOL I THOUGHT I WAS THE ONLY ONE IN THE STATE WHO COULD BE SO STUPID

 

[atargainz]

omfg i integrated one side of the square too lol i thought i was the only one in the state who could be so stupid

FUCK ME TOO THE CYLINDER ONE. That actually made the integration harder, hoping for 3/2 marks

 

[babyoats]

Shouldn't 8 be b?

 

[helloimyellow]

feels when you get question 1 in MC wrong

 

[Yeungster]

RIP ME

 

[Carrotsticks]

Shouldn't 8 be b?

Yes it should, thank you. I had the right answer in mind but typed it out wrong.

 

[hawkrider1]

Here's a first draft. Please feel free to point out any typos/errors that you may find =)

https://www.dropbox.com/s/b9ita5smd8fmhok/HSC 2015 Extension 2 Solutions.pdf?dl=0

Love you carrot no homo

 

[ifireballx]

Isn't 1 + 2nC2 + 2nC4 +...+ 2nC2n = 2^2n-1?

16 b) iii)

 

[Carrotsticks]

Isn't 1 + 2nC2 + 2nC4 +...+ 2nC2n = 2^2n-1?

16 b) iii)

Yes it is, thank you. Force of habit (as the power is usually just n).

 

[drnobody901]

What do you think a raw mark of 82% will scale to

 

[helloimyellow]

What do you think a raw mark of 82% will scale to

^ I would like to know this too considering that's about where I'm at.