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Search results

  1. MustafaMotani

    Mathematics: Post your doubts here!

    there is no r in part a... u must have seen wrong ..?? check it again...
  2. MustafaMotani

    Mathematics: Post your doubts here!

    i have done part a are us asking for part b..?
  3. MustafaMotani

    Mathematics: Post your doubts here!

    In general Sn = n/2 (2a + (n-1)d) therefore n/2 (2a + (n-1)d) = n^2 + 8n n/2 (2a + dn -d) = n^2 + 8n na + n^2(d/2) - dn/2 = n^2 + 8n Comparing... d/2 = 1 d=2 a-d/2 = 8 a=9 are answers correct..? Rutzaba
  4. MustafaMotani

    Mathematics: Post your doubts here!

    which.?
  5. MustafaMotani

    Mathematics: Post your doubts here!

    syed1995 just a way to remeber which sign to take... If yu are taking right hand side of the curve or in the domain x >a yu will take positive sign and vice versa... reasonjng is quite simple btw
  6. MustafaMotani

    Mathematics: Post your doubts here!

    syed1995 from graph plotter.. xD
  7. MustafaMotani

    thanx.. :)

    thanx.. :)
  8. MustafaMotani

    Mathematics: Post your doubts here!

    falcon678 daredevil.. here is a snapshot of the graph in the question u gave .. i just pinned it for yur understanding.. there is nothing to do with the answer.. u can see as we go across x (after x>0) y is decreasing... tis we had to prove..
  9. MustafaMotani

    Mathematics: Post your doubts here!

    gary221 lol no yu arent bother.. :D.. I just got it by looking at it... it said we have to do it in three intervals... we knw two values 0 and pi/4 ... so to get third just find the mid -value .. :D
  10. MustafaMotani

    Mathematics: Post your doubts here!

    gary221 three intervals are 0, pi/8, pi/4 u have to ensure that d is constant
  11. MustafaMotani

    Mathematics: Post your doubts here!

    daredevil well if yu ask for concept... see function is increasing if value of y increases as you go across x axis ... for this to happen the gradient of the function has to be positive thus greater than zero.. twll me if yu dont get it
  12. MustafaMotani

    Mathematics: Post your doubts here!

    gary221 do you know trapezium rule or is it that u are facing prob with this particular question..?
  13. MustafaMotani

    Mathematics: Post your doubts here!

    falcon678 calc dy/dx then solve dy/dx < 0 yu will probably end up with x>0 (shown) explanation for increasin function dy/dx >0 for decreasing function dy/dx < 0
  14. MustafaMotani

    Mathematics: Post your doubts here!

    yeah old days.. :)
  15. MustafaMotani

    Mathematics: Post your doubts here!

    Rutzaba lol he just solved it
  16. MustafaMotani

    Mathematics: Post your doubts here!

    last msg was for daredevil thanKX syed1995 ... mine are p1,p3,s1,s2 physix chem are goin well
  17. MustafaMotani

    Mathematics: Post your doubts here!

    nP.. :) bdW i also remember yu from the last year.. :D
  18. MustafaMotani

    Mathematics: Post your doubts here!

    syed1995 daredevil (y)
  19. MustafaMotani

    Mathematics: Post your doubts here!

    falcon678 i) can be little hectic wait i might try.. ii) will be very easy because cos 90=0 and therefore whole product will be zero
  20. MustafaMotani

    Mathematics: Post your doubts here!

    syed1995 yeah i think so... i just remeberd lst year when we were on xpf for more than 12 hrs and so came again.. :) my subs are accel maths, physix, chem and eco
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