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  1. Scafalon40

    HELP ! I NEED CHEMISTRY AND PHYSICS REVISION GUIDES ? URGENT

    here:http://www.xtremepapers.com/community/threads/some-different-notes-website-are-available.10423/
  2. Scafalon40

    HELP ! I NEED CHEMISTRY AND PHYSICS REVISION GUIDES ? URGENT

    AoA its me you won't find the cambirge guides although there is one for edexel chemistry
  3. Scafalon40

    Mathematics: Post your doubts here!

    thanks
  4. Scafalon40

    Mathematics: Post your doubts here!

    you could at least try to read the "but what symbols do we use for the double derivative after this step" part what part of "but what symbols do we use for the double derivative after this step" don't you get?
  5. Scafalon40

    Mathematics: Post your doubts here!

    you should really try to understand all the posts let me make it obvious WHAT NOTATION DO I USE AFTER THIS STEP: ∫ d^2y=∫ 3x+1 dx^2 jeesh, don't you bother to read the whole post
  6. Scafalon40

    Mathematics: Post your doubts here!

    for a single derivative we integrate like this: dy/dx=3x+1 dy=3x+1 dx Integrating both sides: ∫ dy=∫ 3x+1 dx y=(3/2)x^2+x+c but what symbols do we use for the double derivative after this step ∫ d^2y=∫ 3x+1 dx^2 i understand the method but am unsure of the symbols
  7. Scafalon40

    Mathematics: Post your doubts here!

    could you tell me what symbols are used when integrating the double derivative
  8. Scafalon40

    red spot pastpapers

    dont know
  9. Scafalon40

    Mathematics: Post your doubts here!

    given that (d^2)y/dx^2=2x+1 (i.e the second derivative) and that dy/dx=y=3 when x=-1, find y in terms of x. Ans y=(x^3)/3 +(x^2)/2 +3x +35/6
  10. Scafalon40

    red spot pastpapers

    alright
  11. Scafalon40

    red spot pastpapers

    but those are not topical:(
  12. Scafalon40

    red spot pastpapers

    resource pack, what is that?
  13. Scafalon40

    red spot pastpapers

    do topical red spot past papers for phy, chem, bio contain all the questions in the years that they state? e.g in a physics topical past papers book it states that it has papers from 2000-2010 is that true? i checked out there 1000 mcqs series, it was missing tonnes of mcqs ! any remarks?
  14. Scafalon40

    username

    so they can change it then?
  15. Scafalon40

    username

    can you change your username on these forums? if so then how?
  16. Scafalon40

    Some Different Notes & Website Are Available !!!

    great job, but can anyone tell me who is the author of that study guide, who are the publishers eg is it CUP, OUP etc
  17. Scafalon40

    Mathematics: Post your doubts here!

    a related rates of change question Two quantities p and q are related by the equation (p-1)(q+2)=k where k is a constant. When p=5 units, q is 7 units and q is changing at the rate of 0.04 units per second. Find the rate at which p is changing. The answer at the back of the book is 0.018 units...
  18. Scafalon40

    certificates

    thanks
  19. Scafalon40

    certificates

    do we get some sort of certificates for topping a region, country, or the world? if so, then when and how?
  20. Scafalon40

    Mathematics: Post your doubts here!

    Please solve this, what do i do with the cos^2 in part (b) Q5 http://www.xtremepapers.com/CIE/Interna ... _qp_11.pdf paper 11 in 2010 exam
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