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  1. Y

    Physics: Post your doubts here!

    Can some explain q25 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s04_qp_1.pdf
  2. Y

    Mathematics: Post your doubts here!

    Guys can you explain how to prove the identity from simplifying left side to right side? Q2 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w10_qp_12.pdf
  3. Y

    Physics: Post your doubts here!

    Can some one explain this: http://www.drivehq.com/file/df.aspx?isGallary=true&shareID=6762768&fileID=466048488 q 27
  4. Y

    Mathematics: Post your doubts here!

    Guys need some help here: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w11_qp_62.pdf q3) b) How did it come to 7!/3!x6?
  5. Y

    Mathematics: Post your doubts here!

    Thanks man.
  6. Y

    Mathematics: Post your doubts here!

    Got one quick question guys http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s12_qp_11.pdf Q8) ii) Shouldn't the range be f(x)>=-4+k? Because (x-2)^2>=0 (square an expression is always a positive number) Then (x-2)^2-4+k>=-4+k...
  7. Y

    Mathematics: Post your doubts here!

    Thanks. I got it because no number above or equal to 0 is accepted.
  8. Y

    Mathematics: Post your doubts here!

    Al hamdulilah. Can someone explain this: http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_13.pdf q(iii) I got gf(x) as 4x^2-9 Then 4x^2-9<=16 By using the quadratic formula we get x as -5/2 or 5/2 Then the values of x should -5/2<=x<=5/2...
  9. Y

    Mathematics: Post your doubts here!

    So y=8-(4/3)x is accepted even though it's not written in the marking scheme? Anyways thanks man!
  10. Y

    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 explain q2) I got the differentiation part, but how can we use the first derivative to show that all gradients are positive? and q7)i) I used this method...
  11. Y

    Physics: Post your doubts here!

    Especially the ones with simultaneous equations.
  12. Y

    Physics: Post your doubts here!

    Thanks again. I guess these type of questions are really easy.
  13. Y

    Physics: Post your doubts here!

    Thanks, I used the kinetic energy method. I somehow got that wrong hahha. Can we use that method?
  14. Y

    Physics: Post your doubts here!

    Can someone explain the answers to these questions? The answers are q12)A EDIT- q9 can be ignored as I found the answer.
  15. Y

    Mathematics: Post your doubts here!

    Yeah I did.
  16. Y

    Mathematics: Post your doubts here!

    Thanks, as always.
  17. Y

    Mathematics: Post your doubts here!

    minato112 Can you explain why there is no turning point?
  18. Y

    Physics: Post your doubts here!

    Thanks.
  19. Y

    Physics: Post your doubts here!

    Guys, does anyone have the marking scheme for 9702_s02_ms_1.pdf
  20. Y

    Mathematics: Post your doubts here!

    Why is there no turning point?
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