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this refers to the two identical case (since you choose 1 of A,B,C,D and 2 E's) but you got it anyways >.>

Recall the power property. i.e. logx^2=2logx As well as division and multiplication. e.g. log3/x=log3-logx; log3x=log3+logx

You choose 2 of the four then permutate it 3! times. likewise for the last last part: you choose 1 of four then permutate it 3! times and divide it by 2! due to repetition

i think you can actually have it decay at that rate... thus the reason why the answer is non-zero

'theoretically' is not in the yr12 math dictionary im afraid

yeah, the lesson is to never jump into permutation/comb questions without a game plan :P How did you get "6P3-4C1*3P3*2P2"??

Fhritp

Teach it. If you can teach it to a sibling in a concise and structured manner without them getting lost (unless they're much younger than you) then you're good to go. Sadly i teach it to the wall. #sadlife

^ this only slightly harder, trust.

Re: Tutoring: 99.4|Chemistry, Physics, Maths and English I don't know this guy. But I support him.

Or you could just work ahead of the class and make notes during holidays (like right now). This is one of the key advices I've seen on the forums. School time should be devoted to focus and understanding as well as strengthening already learnt concepts. Content covered in school should not be...

re: HSC Physics Marathon Archive Slightly complicated I recommend the motor from the Jac textbook

nah mate, im ESL too raw mark for band 6 would be in the mid-high 80s state rank would be looking at mid 90s

Brah just learn maths as an outside hobby. Put aside 2-4 hours a week and do some 2U maths. If you're decent, 2 years of 2U can be compressed into 60 hours (which will take at most a year) But yeah...def need maths mate

memorise the syllabus? like word for word? :lol:

well, rearrange to isolate sin^2feta and sub in fatter=15

Re: HSC 2015 2U Marathon Interesting solve by integrand. Is that legible in an exam? lol

you ruined the fun mate, get out of here Rhinoz :P

Re: HSC 2015 3U Marathon Yup, seems legit (since no allocated marks, safest bet)

Jk, it's a simple exponential rate question. Think logically. Decay does not happen in an instant. It gradually decays, so each time it decays, the factor of decay (i.e. the 100%) changes (more specifically - slows down) Give it another shot mate, look over your textbook for hints (havent seen...