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  1. A

    Reaction of sulphur with chlorine

    I know the product is disulphur dichloride S(2)CL(2), but why is it not written as SCL on the websites and textbook as oxidation number of sulphur is +2?
  2. A

    Study guide pk

    Study guide pk has been hacked! Anyone has any physics notes or e-books that they downloaded there?
  3. A

    Stats Book

    Anyone know where I can download the book 'An Advanced course in statistics' by Crawshaw and Chambers online?
  4. A

    centroids

    Find the coordinates of the centroid of the finite region bounded by the x-axis and the curve whose equation is y = x^2(1 − x). Ans = (3/5,2/35) Deduce the coordinates of the centroid of the finite region bounded by the x-axis and the curve whose equation is y = x(1 − x)^2. Ans = (2/5...
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    June 2009 Further maths

    Having a problem with this... The line (l1) is parallel to the vector 4j − k and passes through the point A whose position vector is 2i + j + 4k. The variable line (l2) is parallel to the vector i − (2 sin t)j, where 0 ≤ t < 2p, and passes through the point B whose position vector is i + 2j +...
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    June 2005 Further Maths

    Paper 1 Number 4 first part, where I have to show that the sum of the cubes of the roots is -3. I know the sum of the roots and the sum of the squares of the roots but how do I find the sum of the cubes? Any help please? Here is the question... Show that the sum of the cubes of the roots of the...
  7. A

    getting to know everyone

    Hi, am anil, glad to meet everyone!
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