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Yes, you're allowed to do that. Consider the graph of y=1/x. Say you want to find the area between x= - 2 and x = -1 then by symmetry this is the same as the area between x=1 and x=2. Or just use absolute values (easier ;) )

ahh my bad then. I thought I saw a '4t'..

Yeah... and how do you find horizontal asymptotes? That right, TAKE THE LIMIT as x--> +/- infinity... and it could well be asked in a 2U exam. ie, find stat points, inflexions, tendencies and hence sketch. What? That infinity/infinity = 1 :S Yeah right, that's what they all say... No, it...

Ahh good ol' HSC Physics... :cool:

Maybe internally they would do that. But they only submit assessment marks from Ext 1 and Ext 2, so you could wipe the 2U assessments with your backside and just get really good marks in Ext 1 and Ext 2 assessments... :p

In our school the 4 unit students only had to do the first assessment, ie. Series. Then we didn't do anymore internal assessments for 2U. However I did 1 mark off first (ie. 34/40) in that first assessment :D

It's the shape of a helix.

I think I fudged a conics question in my Ext 2 half yearly... I needed to get 81 (ie. 9*9) but for some reason I ended up with 7*7=49, so I just changed the 7's to 9's ... and I got full marks :D

Ahh the wonders of not doing HSC Chem anymore :D Oh and I don't think this is examinable in the HSC...

These are improper integral and are not in the scope of the current NSW syllabus for Extension 2 Mathematics I believe.

The method employed is to factorise the fastest growing term in the denominator from both the numerator and denominator and cancel. Nothing that involves infinity/infinity. It could well be asked in a 2U exam. Although yes, it would more likely be asked in a 3U exam. So go figure. You'd be...

Your 'theory' fails with something like (2x+1)/(x-1) even though both the denominator and numerator are linear. Didn't you read above? I stated the 4 cases of indeterminant forms. I knew them when I was doing my HSC. It was wrong because it clearly fails for stuff like (lnx)/x and the example...

Since when in the HSC infinity/infinity = 1 :S And no, I was not using Uni maths to explain HSC concepts. I'll say 'hi' to you soon though :P

You know what was really funny? The fact that the day after this 'argument', we had a lecture on limits which proved that I was right... :hammer:

Are you sure that you didn't type the equation wrong?

*sigh* I dunno why ppl hate Coroneos so much =\

I think the questions is wrong. Where's it from?

Mine does...

Coroneos :) I did solutions too for the Perms and Combs chapter. I found that it covers most types.

I did it mentally now and I think you're correct :o