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you can't solve that, and in 2u you're not meant, you just have to understand the swapping of x and y values to do this question

if you still are unsure, i will go through an example: let x=2, i.e y(2) = 4 + ln2, so the point (4+ln2, 2) is on our original function, now this point corresponds to (2, 4 + ln2) on the inverse function as i just swap x and y values as above. So your question f^-1(2) is basically the point (2...

ok now with inverse functions all x and y values swap, so finding f ^ -1 (2) is the same as saying 2= 2x + lnx, which obviously occurs when x=1. so therfore f^-1(2)=1

well when you rotate it you will form an annulus cylinder, cylinder with hole in the middle. Now the height of the cylinder will be 2-x and the radius of the cylinder is y with thickness delta y. Now to work out the volume of that strip what you do is break that annulus cylinder into a...

umm, i can read it, so good enough

I don't believe in trolls.

i also say let s= sinx and c= cosx at start

you should see how fast i do lol, i take like 20-30 secs max

Re: 2012 HSC MX2 Marathon it happens to the best of us sometimes

there is no doubt the answer is 36, if i apply simply combinations (i know general doesnt do it but who cares) there are 3C1 ways to pick a language 4C1 ways to pick a socail science and 3C1 ways to pick a tech thingy. Now because i want a language and a social science and a tech thingy then...

Re: 2012 HSC MX2 Marathon but lets all agree, that for a q8 from a previous trial, this question is rather pathetic in that sense, more suited for q4,5,6

don't be hating now

yucky usyd pool, who would ever want to go there, worst place to study imo

Re: 2012 HSC MX2 Marathon this question i think was from the 2010 sydney tech q8 trial paper, which was shockingly easy for q8.

I feel as tough 2008 was the easiest, I haven't really looked at pre 2000 tests much but I have seen the Q8 that carrot was talking about and I'll agree with him

i like the new dp, conveys spiral's youngness and innocence

just drop to general maths already

i think spiral, this means you should get off and study some more, dont want to be doing this in your HY's now do we? Didn't think so

Re: 2012 HSC MX1 Marathon This question is best suited to harder 3u, which is apart of the 4u course, not 3u, and yes as carrot said

^