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so i know n!= n(n-1)(n-2)....3x2x1 so is (n-1)!=(n-1)(n-2)(n-3)...3x2x1 and (n-2)!=(n-2)(n-3)...3x2x1 how do you do this question :\ im getting a bit confused nC2 + nC3 =220 i knwo itll be n!/2!(n-2)! + n/3!(n-3)!=220 can i get clarification on what the common denominator would be??? is it...

YOU HAVE ALREADY LEARNT THE ENTIRE SYLLABUS??? despite doing hsc int eh same year as me!??!?! what okay you freka me out but thanks for the tips!!!! yeah.. bop and cad :@:@:@:@:@ we touched on that in topic 3 and it was pretty damn hard... oh another thing, how do you guys set up your...

oh dear.. what textbooks is everyone using? ive got some crappy 2008 version :( statistics aren't that great.. and when they atalk about "current stances of fiscal policy" it is not even current -____- sigh

|t+2|<5-|3t-1| t^2+4t+4<5-(9t^2-6t+1) 10t^2-2t<0 2t(5t-1)<0 therefore 0<t<1/5

Hi :) I think you just need to keep your own personal goals in mind and not let other people's successes dampen your own if you get what i mean... it seems like you stopped trying because you "think you're going to fail" the moment you stop trying you already fail.. so yeah :) pick yourself up...

is anyone even doing this... i can find NOTHING in resources!!!

i cannot prove that 3rd one :(

Okay so for question 5 i got this...

are you sure.. i didnt get that exploit wahts the answer i got 11/2root3 and -6/2root3 using quadratic formula....

yup sazlik is 100% correct... it makes no difference what order the curves are subtracted as long as there is an absolute value outside.. i think this method (of using absolutes) is incredibly fast when it comes to those annoying curves that cannot be drawn (or if you are one who has trouble...

hey! could someone let me know where i can find more information on STAT and teh dates and everythingggg... i am quite confused but think i want to do it didnt have time to ask the careers advisor before school hols(help me out here please!)

well i got a mark of around 80% the highest was like 94% or something however apparently the average was only 70% (not sure yet) sighhhh :( damn half yearlies oh wow that must be some pretty intense competition by the way.. not being able to drop marks

haha omg :P you poor things... i remember staying up till 3am cramming for eocnomics just last week (failed completely anyway) goodluck!!

my school doesnt have a gardener..... i think.... we have this creepy man who fixes broken lights etc... i guess its safe to say that my school has no HOT teachers at all.. pregnant check hideous check bitch headteachers check

what factors would these be?? and another question... in the hsc exam when it comes to that whole school rank determines atar mark etc etc would both people that came "1st" be getting the highest mark attained by anyone at that school as their corresponding HSC EXAM MARK added to their HSC...

hi could someone please explain ranking to me eg. in a hypothetical situation like there are 5 kids two with the mark of 80% two with 90% and one with 50% would the person with 50% be rank 5 or rank 3? (there are only 5kids/hypothetically speaking) a bit confused if someone could explain thanks

your ranks are fine? however you'll definitely want to pick up on your english marks because the 2units of english (at whichever level) will be COUNTED regardless of how many units you are doing if you think that your other subjects will benefit if you drop something then go ahead but otherwise...

I want 97+ so i can do psychology :D (at usyd)

lol really.. perhaps its cos i didnt pay attention in year 11 eco and last term so i have no idea whats going on... hopefully i can catchup in the nxt 2 weeks...... do you have a good teacher?