General Thoughts: Mathematics Extension 1 (4 Viewers)

[dshah73]

shit... that was so hard!!!!!! 2012 and 2013 was so much more easier.... got wrecked by PROBABILITY :rage:

 

[Salayman]

Exam was funny, the last question on my exam was, "What was the probability you will not be able to do this question?"
Answer was 100%

 

[enigma_1]

yea i couldn't get the locus one waaaa

yeah omg spent like 3 pages on it getting the wrong answer :/

 

[orcevalm]

i think every 3U person that doesn't do 4u is crying right now

 

[emilios]

Why did people find the probability Q hard? Probability is my weakest topic (entirely neglected in 4U) and I thought that it was a standard binomial probability Q (something you find in textbooks)

Um I dont think the last probability q was a binomial? It asked for the prob that A will win eventually. The binomial was in Q11 and yeah was pretty standard

 

[QZP]

i think every 3U person that doesn't do 4u is crying right now

Yeah I think the paper was a bit skewed to favour 4U students (in terms of the critical thinking required). Not sure how this will affect cutoffs

 

[emilios]

OH btw I did the related rates q with implicit differentiation (worked out beautifully). Will that be accepted?

 

[QZP]

Um I dont think the last probability q was a binomial? It asked for the prob that A will win eventually. The binomial was in Q11 and yeah was pretty standard

Oh yeah hahaha. Sorry forgot the question (was confusing with the rain).

 

[emilios]

yeah omg spent like 3 pages on it getting the wrong answer :/

Oh yeah hahaha. Sorry forgot the question (was confusing with the rain).

Did you get out rhe last q ? Its a pretty common 4U q I believe so yeah defs skewed toward 4U students BUT I still didn't get it lol goes to show how dumb I am

 

[dshah73]

i think every 3U person that doesn't do 4u is crying right now

agreed

 

[QZP]

Did you get out rhe last q ? Its a pretty common 4U q I believe so yeah defs skewed toward 4U students BUT I still didn't get it lol goes to show how dumb I am

Yeah you GP sum P(win 1st) + P (2nd) + ... (this part reminded me of binomial not sure why)

 

[Triage]

Yeah you GP sum P(win 1st) + P (2nd) + ... (this part reminded me of binomial not sure why)

I identified that it was a gp but couldn't knock the answer out. Will this obtain a mark?

 

[emilios]

Yeah you GP sum P(win 1st) + P (2nd) + ... (this part reminded me of binomial not sure why)

OMG I DID THAT but for some reason it didn't work

i always confuse myself with the expression of the last term

so i guess i got 1 mark for that at least LOL. still happy.

 

[Nukeboy]

I got the last part by just taking your answer to part i as the first term and r^2 the common ratio, then sum to infinity

 

[iStudent]

For locus you got y/x=t
sub t into one of the coordinates simplify to get circle equation

 

[Triage]

OMG I DID THAT but for some reason it didn't work

i always confuse myself with the expression of the last term

so i guess i got 1 mark for that at least LOL. still happy.

same thing happened to me lol

 

[iStudent]

Pretty good exam tbh

 

[Nukeboy]

For locus you got y/x=t
sub t into one of the coordinates simplify to get circle equation

Oh that's how you do it. Got up to the y=tx part

 

[emilios]

For locus you got y/x=t
sub t into one of the coordinates simplify to get circle equation

fuck.

EDIT:

fuck.

 

[mrpower]

pretty sure i got 66-67/70