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  1. S

    Are you ready for 9709 w15 p32(mathematics p3)?? :D

    3 High value As and 1 C can achieve you A as final, all depending on how high your A values are, else you get B, never below
  2. S

    Are you ready for 9709 w15 p32(mathematics p3)?? :D

    >65 -A Might be more cause of paper difficulty low
  3. S

    Are you ready for 9709 w15 p32(mathematics p3)?? :D

    Yeah cambridge level has downgraded this year( My friends saying because last year there were too many failures) I'm ashamed to have done a silly mistake on iterative question first part.. It said 2 consecutive numbers and I wrote 1 and 3 instead of 2 and 3 T_T
  4. S

    Are you ready for 9709 w15 p32(mathematics p3)?? :D

    You can guess from the P1, what you didn't have there will probably be in the p3, such as Geometric progression, else other questions are too vaste, you normally get differential vectors 2 complex etc.. Revise g.p well though it didnt come out in p1 high probability to come up in p3
  5. S

    How was 9709_w15_qp_62?

    Noooooo even if you get 20 or 16, the value for the probability should be same cause denominator gets cancelled in the division.. You must have done another mistake to get1/2 as answer like me
  6. S

    How was 9709_w15_qp_62?

    3 for finding var(x)
  7. S

    helppp

    Give full question next time you ask something, this is easy use Marking Scheme when you dont know something Use the form in part (ii) and you get 2values of pheta( reject the other 4 you "normally" get. I believe you get 6values in total right?) Then replace these 2 values of pheta in equation...
  8. S

    helppp

    You can do this by iterative formula but I think it is not the best method. Is that the full question in itself? just asking for X^3 − x +6√3 = 0? You can go polynomial but I don't know how to get f(x)=0 in this case( there's formula beyond A level scope though you could use)
  9. S

    How was 9709_w15_qp_62?

    Yo any idea where you messed up? I got final ans 1/2 too but i remember doing the table fine(checked but adding everything they became 1. But i too messed up the varience my mean wasnt exactly 1
  10. S

    How was 9709_w15_qp_62?

    Hell yeah its 480. 5! For 5remaining seats and 2!*2! For j and s arranged between 3seats while being together. Also the 30 is obvious 6C4*4C4*2 But what about positive/even? Any experts I did it wrong and got 0.5
  11. S

    Physics: Post your doubts here!

    Experimental uncertainties.... It's for practical ones( using meter rule etc...) I was referring to second part of explanation. Obviously experimental uncertainties should be to 1sf, cause you can't read more than 0.1 on a meter rule lol( or other instruments such as micrometer, protractor). I...
  12. S

    Physics: Post your doubts here!

    Strange. Either my physics teacher was in the wrong or years have changed and so did answers? I need to confirm this with more teachers and friends , could you provide me the question for the "attached" screenshot? Also thanks for the info really didnt know about this throughout 2years I've been...
  13. S

    How was W15 qp 12?

    I forgot somehow but I remember after i obtained value of k, everything became as clear as water. Friday I try ask my school for paper and work it for you if you wish. @everyone what's done is done don't stress too much, as my father always say only look forward and prepare for whats next! Also...
  14. S

    How was W15 qp 12?

    I'm not trying to boast here but this paper was relatively easy compared to all those past papers I've worked before. For the vector 1st part, you take them as colinear points on a straight line, the direction vector is same but the distance is different. You need to multiply with a number to...
  15. S

    Physics: Post your doubts here!

    That's so wrong! Who told you that? Don't do that mistake in exams they will penalize you for this. You never came across an uncertainty with +- 0.25 or +-1.5 in any question paper? You must keep working more papers then. These are 2s.f btw More info here...
  16. S

    Physics: Post your doubts here!

    Why not use power10. (6.45+- 0.323)*10^3 Or to 2sf both as you seem fit
  17. S

    Physics: Post your doubts here!

    P According to me max speed should be half sphere end horizontal at either left or right. Think of it as an shm max kinetic energy is always at equilibrium position. As for acceleration half sphere vertical logically( up or down)
  18. S

    Physics: Post your doubts here!

    Either 2 or 3. They only penalise if you write to 1sf or to more than 3sf( unless specified in the question) This statement does not apply for uncertainty questions!
  19. S

    Physics: Post your doubts here!

    Sorry for late reply you might have already got the answer but just in case I'll explain it. For an ideal gas, Internal energy is proportional to Temperatuer. Since temp= constant, Change in U=0 According to first law of thermodynamics, Q-W=0 Therefore, Q=W Meaning all the heat added to the...
  20. S

    Mathematics: Post your doubts here!

    It's hard to copy paste pheta everytime, I'm using pheta=@ ok? sin (2@+@)= sin2@cos@+ cos2@sin@ -------1 This you get in formula sheet. Then what is sin2@ and cos2@? sin 2@= 2sin@cos@ cos 2@= 1-2sin^2 @ Replace in first equation 2sin@cos@cos@ +(1-2sin^2 @)sin@ 2sin@cos^2 @+(1-2sin^2 @)sin@...
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