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u forgot P1 _ _ _ _ P2 = 4! and P2 _ _ _ _ P1 = 4! which gives 6*4!/6! which is the same as 3!*4!/6!

for that 1 i just let u=x^4 du/dx = 4x^3 d(tan^-1 u)/du = 1/1+u^2 du/dx * d(tan^-1 x^4)/du = 4x^3/1+(x^4)^2

i counted the 4 children as one since they are seatin together then multiplied it by the way they can be arranged together. then divided that by 6! therefore 3!*4!/6! duno if im right tho

YES THATS WAT I GOT TOOOOOO!!! =]

add the 2 equations to get arcsinx + 3arcsinx = pi/3 + 2pi/3 4arcsinx=pi arcsinx= pi/4 x=1/sqrt2 then sub that in one of the equations to find y

I(0-->10)50-50e^(-0.2t) = [50t +250e^(-0.2t)]0-->10 cant find my calculator lol sorry

did anyone do q7 (ii)? thats the only q i couldnt do lol

u dnt need to find C since you're using limits

integrate v with limits 0-->10 i think?

That Was So Easy !!!!!!!!!!!!! Im So Happy First Exam I Actually Think I Aced

HOW DID U GET IT SO FAST LOL!!!!!!!!! i get really close to 1 lol but cant get there please post the solutions lol this is kilin me

i think for 2) |z|=1 im not really sure tho

how do u do that??

would u lose marks if u talked about the same radioisotope for both medical and industry? i only studied cobalt-60 for both medical and industry, i knew a question like that would come up but i thought it woulda said medicine OR industry. i talked about cancer treatment for medicine and...

wrote 3 pages of stuff that didnt make any sense. hardest question in the exam for me. what were you suppose to talk about. did you guys do Bruce Dawe?

but the hsc plus scheme will get me 4 extra points for a band 6 in both 3 and 4 unit maths. I LOVE HSC PLUS

ill be so happy with 70, happy as in ill cry of happiness lol ive been playing around with the sam uai thingy and a 70 in english with all my other marks will get me around 95 uai which is insanely good to my standards. way more than i need for commerce at unsw

thanks guys i was desperate to scrape in the 60s but u guys got my hopes up, english is my worst subject and im scared its going to pull me down. im doing really well in my other subjects (ranked first in 3+4u maths, physics and chem) and it was just english i was worried about. what is the...

hi i've been getin around 50-55% in standard english and i am ranked 22nd/140 in an average school, i was just wondering if i would still get a hsc score of around that range for english or is there a bit of scaling done?

getin band 6s in maths ext1 and ext chemistry and french3U, but im still screwed!!!! i cant even get above 50% in standard english which will pull me down to a uai in the 80s...