2010 MM Exam 2 suggested solutions

[Mao]

Semi-worked solutions. I didn't go into as much detail as enwiabe, but all the key steps are explained.

That was a really difficult exam. So it's not the end of the world, you guys can take a chill pill and now GO STUDY FOR CHEM.

[chopz]

If not, I guess I will after I get up. You have ~30mins before I start.

I think we all trust your answers good man.

[3Xamz]

Please do my friend
Some people said they would but noones published anything.
+Karma if you can post it sometime soon

Cheers

[Mao]

First post updated. Here you go guys.

[3Xamz]

MAO SAID IT WAS HARD, WE ARE ALL SAVED! :D:D

[lorcan_raven]

THANKYOU MAO!
I can now sleep.

[axilon]

amazing!!!

quick question, for the expected number of statues, how many marks out of 4 would i get if i used the wrong p value,
for some reason i used 0.7 not 0.75 even though it was given, ultimately i got E(x)=1.1??
thanks in advance =D

[lorcan_raven]

You would get 1 mark off for wrong answer, 2 marks in your favour for method working, and POSSIBLY lose a mark for subbing in the wrong P value... But you at least will get 2/4 - if you pray, and believe in yourself, maybe VCAA will look into their icy, blackened hearts and give you that one mark, axilon!

[johnson]

some of your working out i didnt even understnad T.T . ihope i can get a 30!!! MAO your a genius =D

[axilon]

fingers crossed!!!!
didn't know they had hearts?? =]
thanks man.

[stonecold]

Great, another mark gone.  Guessed the number of S.Ps as 3, because it was quartic lol.

Looking at the last two sections of Q2, they were probably fair game.

Under the pressure of the exam I had no idea what I was doing but they weren't really that hard.  Just need to think outside the square a little.

Got completely shit on for the last question though.  CAS kept on spitting out errors, and I just left most of the questions with gibberish workings...

[98.40_for_sure]

Great, another mark gone.  Guessed the number of S.Ps as 3, because it was quartic lol.

Haha same. I immediately thought ooh a quartic *thinks of W shape*
"yes yes yes W means 3 stationary points"
*writes 3*
Assessor: PENS DOWN
"SHIT ITS 2"

[cypriottiger]

i finally figured out how to do the last question and was busy typing it in to my calculator and supervisor says "pens down"
i was tempted to keep going seeing as i was using a pacer...

[lisafaustina]

question 2.2a - it was possible to do this using a tree diagram right? a markov one or whateva

[lisafaustina]

hey with question 2.3e with dT/dx shouldnt it be a negative sign before 12cos(x)^5sin(x) blabla