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  1. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w11_qp_11.pdf Can someone please help me with no. 11 (ii & iv)? I totally don't understand how the range becomes 2 ≤ f(x) ≤ 10 In addition, please explain how to sketch the graph...
  2. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w11_qp_11.pdf Please help me solve question no. 3, I do not understand how to do it. An explanation will be appreciated. Thanks a lot!
  3. salvatore

    Mathematics: Post your doubts here!

    I'm really sorry for bothering, but i still don't understand how you solved it.. especially the part where you got 6y^2. Please help me understand it. Thanks
  4. salvatore

    Mathematics: Post your doubts here!

    Thank you for your reply. I don't understand how you got 6x^2.. isn't it 6x in the equation?
  5. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_11.pdfNo. 5 (ii) Please help me solve the question above.. thanks!
  6. salvatore

    Mathematics: Post your doubts here!

    Omg! How could I not know that? Thanks man..
  7. salvatore

    Mathematics: Post your doubts here!

    Thank you for your reply.. I don't understand the last part i.e v=pi(-a²/x). How did u get the integral as (-a²/x) ? Sorry for bothering..
  8. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s10_qp_12.pdf No. 2 Please help me solve the question above.. an explanation will be appreciated. Thanks!
  9. salvatore

    No problem.. take your time :)

    No problem.. take your time :)
    • salvatore
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  10. salvatore

    Chemistry: Post your doubts here!

    Thanks.. I kinda get it :)
  11. salvatore

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20%289701%29/9701_s11_qp_21.pdf No. 5 d (ii) Please help understand how to solve the question above.. I'm completely blank! An explanation will be appreciated.. Thanks
  12. salvatore

    Chemistry: Post your doubts here!

    Hey guys, Could anyone please help me understand Hess's law & enthalpy cycle? I am completely blank! I don't know which directions should the arrows point and why. Please help me with this.. I'll appreciate a good explanation. Thanks.
  13. salvatore

    Physics: Post your doubts here!

    Thanks!
  14. salvatore

    Physics: Post your doubts here!

    Variant 21.. please show me the working of no. 2 (d)
  15. salvatore

    I assume ur smiling at my avatar :-) Datz true ryt?

    I assume ur smiling at my avatar :-) Datz true ryt?
    • salvatore
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  16. salvatore

    Mathematics: Post your doubts here!

    Inverse: (i) Make equate the function to y -----> y = (2x − 3)^3 − 8 (ii) Make x the subject -----> y + 8 = (2x - 3)^3 (y + 8)^1/3 = (2x - 3)^1/3.... ^1/3 refers to cubic root (y + 8)^1/3 = 2x - 3 (y + 8)^1/3 + 3 = 2x x = ( (y + 8)^1/3 + 3 ) / 2 (iii)...
  17. salvatore

    Mathematics: Post your doubts here!

    Oh yeah.. hadn't figured that out earlier.. that was dumb of me. Thanks for your help mate!
  18. salvatore

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s09_qp_2.pdf No. 2 (d) How do you solve the question? Please help!
  19. salvatore

    Mathematics: Post your doubts here!

    Lool.. dw, u'll become a legend ;) The part about Area K is correct.. but I think you have made an error in Area H. According to the marking scheme, you are supposed to find the area of a trapezium and subtract it from area K. Now where did the trapezium come from?? :confused: :( And yeah...
  20. salvatore

    Mathematics: Post your doubts here!

    Thanks a lot bro.. ur awesome! I think you forgot about no 11 (iii).. please explain if possible. Sorry for bothering :)
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