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  1. C

    Scabing marks :) (its okey for the HSC lol)

    I went from Rank 11th to Rank Equal 2nd in my Physics half yearly =D But it wasn't mark scabbing, they had named my multiple choice paper wrong!
  2. C

    Integration

    *doh* Thanks Trebla... I'm really off the pace today :( Edited with the correct question
  3. C

    Integration

    Hi, I've yet again have one more question... \int(9+x^2)^\frac{1}{2}dx Thanks
  4. C

    Integration

    Yes I typed the question wrong... -_- The correct question is: \int (9-x^2)^\frac{1}{2} Can anybody do it please? Thanks =D
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    Catholic Church and HIV/AIDS in Africa.

    Are you saying that it hasn't caused ANY problems at all?
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    Integration

    sorry gurmies.. wrong question.. there was supposed to be a square root.
  8. C

    The "I didn't go well in my half yearlies" Thread

    I got Maths Ext 2 - 83% (4th) Maths Ext 1 - 90% (2nd) Physics - 82% (2nd) English Adv Speech - 65% (Rank 70ish) :( Chem - Don't know yet
  9. C

    impossible maths questions

    Well all three answers exceed your IQ.
  10. C

    Integration

    Thanks gurmies... I have a little problem again here... The question was: \int (9-x^2)^\frac{-1}{2} dx The answer in the back was: \frac{1}{2}( x \sqrt{9-x^2} + 9sin^{-1}\frac{x}{3}) I put it through Wolfram Mathematica and got: \frac{1}{2} x \sqrt{9+x^2}+\frac{9}{2}...
  11. C

    Integration

    sorry about I've got another one... \int \frac{(x+1)dx}{(x^2-3x+2)^\frac{1}{2}} Thanks
  13. C

    Integration

    Hi, I got another question... \int \frac{dx}{sinx cosx} Thanks
  14. C

    Catholic Church and HIV/AIDS in Africa.

    I think someone enjoys having sex too much and is in denial :P
  15. C

    harder 3u question

    Does the fact that the previous question (or part) said that x+y+z >= 3(xyz)^(1/3) help?
  16. C

    Integration

    Hi, I have another question. Could someone please help me? Thanks \int \frac{dx}{cos^2(x/2)-sin^2(x/2)} Thanks
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    harder 3u question

    Yep... x>0, y>0, and z>0 -- Sorry should've said it before.
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    harder 3u question

    Suppose that (1+x)(1+y)(1+z)=8. Prove that xyz<= 1 Thanks
  20. C

    Integration

    Hi, could someone help me? Thanks \int \frac{1}{1+cos^2x}}dx
  21. C

    integration

    Re: 回复: Re: 回复: Re: integration lol... You can try that... it wont get you very far.
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    HSC questions

    Hello, I was looking over a few HSC questions for practice and the following came to mind. I'm not that good at English, so for the following questions in the 2006 and 2005 HSC, what would the marker be looking for, and what should I've written to get a Band 6? Could someone please give me a...
  23. C

    Integration Question

    Integrate dx/(x2(1+x2)) Thanks to anyone who can help me..
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