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Make the point an arbitrary x1,y1 and use the perpendicular distance formula.

I'll be perfectly blunt, if you are a candidate for 1st in the state in those subjects and you aren't at a top selective school, you should be absolutely crushing everyone else.

No unless you go to Ruse and come second pretty much. Which subject are you talking about though (for some this will be more possible)?

Its final HSC mark, so exam and assessment.

Yep thats right so far. Now start a new G.P with x^2 as the first term, then another with x^3 as the first term etc. and sum them. They will all end on the same denominator and simplify nicely.

No worries- its a relatively common mistake. An easy way to check something like that though is sub in some massive value like x=100. The LHS becomes huge but the RHS becomes tiny-> so you can easily conclude you made a mistake. For questions like this, always sub in something big though so the...

Don't know why my post isn't coming up- What I'm trying to say is you can only sum to inifinity like that if the absolute value of x is less than one and the question doesn't even ask for a summation to infinity, just n.

No your third line is wrong. You can only sum to infinity like that if -1<x<1. The question doesn't ask for infinity anyway, just up to n.

I agree with Carrot- don't redo papers because there are so many new ones you could do. What I do though if I actually have no idea how to do a question (not if I get it get it wrong because of a silly or something) is I'll look at the solution and then immediately after cover it up and do the...

Students weren't happen with the difficulty of exams. They took care of the situation... Seriously though, I had a quick flick through 2001 and there were some nice questions so I want to know what happened too. Though, to be perfectly honest, the test isn't so hard that only two people pass-...

log(AB)=logA+logB -> when integrating functions that give you a log, you can therefore put the constant inside the logarithm. This makes things like some mechanics questions easier.

Good luck. That took me a fair amount of effort (wasted life lol).

Me. Drink some concrete and harden up- get your head in the game.

Can you give some context? I'm guessing its for english. Which module? etc.

Like you. BTW, I'm a bit disappointed I didn't really talk to you on Wed- you said hi at the start and then I got distracted and didn't come back sorry :(

lol, that's the same school then as http://community.boredofstudies.org/showthread.php?t=285951. BTW, your numbers for a few subs don't match up so I don't know whats going on tbh.

Tbh, I reckon most would simply write (x)(x^x-1) and assume they are correct.

Yeah it is 4U but its not very hard and I reckon 3U students should learn it because its heaps useful at times (especially when you have something to do with a circle as it avoids having to take the root and differentiate a root which is annoying).

Found what I did wrong- read the question as 3x^3 not x^3. Will retry EDIT: Still doesn't work. You end up with the same answer as above (though with the RHS as 9x^2 + 4x^3 so there actually is equality)

Lol- I'll have to look over my working. I would have made some unco differentiation somewhere