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Could someone please help me with these? Thanks Suppose that a>0, b>0, c>0 (a) Prove that a^2+b^2 >= 2ab (b) Hence, or otherwise prove that a^2+b^2+c^2 >=ab+bc+ca (c) Given a^3+b^3+c^2=(a+b+c)(a^2+b^2+c^2-ab-bc-ca), prove that a^3+b^3+c^3>=3abc Thanks

Re: I screwed up my half yearlies Already got one at prize giving last year. You were patronising me. I know what the max/min values for trig functions are. Which is what I said earlier. Look back a few pages. No prize for seconds mate.

That's too bad then... Someone who got like 30% in a 2U series exam got accepted into Ext 2 at my school :|

I hope so. I hate Conics more than anything. The locus type questions are so annoying.

lol, look at the date, it was posted over a year ago... I think his free offer expired a long time ago... hahaha

Yes they do, especially on University bus routes.

Not many females like maths, so that's unusual :P Are you doing MX2 at school now? The thing about doing MX2 and doing MX1 at the same time is that MX2 helps alot with MX1 (provided that you actually do work in MX2). So ultimately, you could get a better score in MX1 if you did it whilst doing...

Re: I screwed up my half yearlies And? If a maths textbook stated that 4 over 2 is 2, then would I be wrong by saying that 4 divided by 2 is 2? My point is that I've said the exact same thing, the textbook obviously explains it in a difficult way of understanding it. Note the key word "the...

lol, if anyone in this thread actually does get caught, that'd suck so much.

Re: I screwed up my half yearlies I have to disagree. The torque is maximum when the coil is perpendicular to the magnetic field. See attachment.

You can rely on stats, but since when have statistics have been the foundation of our decision. You're risking a possible criminal record, and that's all because you relied on the fact that not everybody gets caught. Well, people have been caught and who knows that the next wont be you? I'm...

You know what else would be funny? If you actually got caught out due to your ignorance.

??? I'm confused... So are you saying that if I use your method of study/prepartion for exams (ie. completing a paper again until I can do it under the set time) for various past papers, then I am likely to do better in exams (and finish whilst attempting all questions), contary to one person...

Yeah I kinda get your logic. But, why would you attempt the whole paper just so that you could just 'rewrite' it? Why wouldn't one just concentrate on the 1% they got wrong? What's the real point in taking time and doing it all again? Thanks

Hello, could someone please help me with the following question. Thanks \text{Find } \text{the } \text{value } \text{of } n \text{ so } \text{that }:\\^nC_3-\left(2.^{n+1}C_2\right)=^nC_1

Don't get those cars... Look around and see if you can get a DeLorean =D

Hello, Do we need to know the proof of the formula for nCr? Thanks

Integration is the process of finding the area underneath a graph.

Hello, For projectile motion in 3U, do I have to derive EVERY SINGLE thing? It's so stupid, some stuff are so obvious and stupid. Like, do I have to state that the acceleration in the horizontal component is zero then integrate it, because I can see what the bloody integral/answer will always...

lol, they're just applications of the reverse chain rule... Yeah his 3U book also has Integration by parts questions in it lol