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  1. MustafaMotani

    Mathematics: Post your doubts here!

    How many accel people are here..?
  2. MustafaMotani

    Mathematics: Post your doubts here!

    are they correct.. first two comes from the graph.. but i recommend yu learn it
  3. MustafaMotani

    Mathematics: Post your doubts here!

    its easy if you have done part (i) its just like finding minimum value of the function.. first find dA/dx and then equate it to zero ... whatever value u get for x ... substitute that value in original function to get the minimum area..
  4. MustafaMotani

    Mathematics: Post your doubts here!

    bro if p moves up then it means tension has to be greater than all the opposing forces hope it helps.. as for part iii i dont have m1 so i dont know wahts coeffiecient of friction.. :(
  5. MustafaMotani

    Mathematics: Post your doubts here!

    for line to be tangent it should just cut the curve at one point, in other words just touch the curve. for such scenario b^2-4ac = 0 first make x the subject from the line equation and then substitute it to the curve equation. You will be left with quadratic equation of y .... now simply apply...
  6. MustafaMotani

    Mathematics: Post your doubts here!

    agreed ..(y)
  7. MustafaMotani

    Mathematics: Post your doubts here!

    Rutzaba underestimated you syed1995 :ROFLMAO: :ROFLMAO:
  8. MustafaMotani

    Career Choices

    hmm good luck.. :)(y)
  9. MustafaMotani

    Mathematics: Post your doubts here!

    she doesnt need to expand in first part.. -.- :P
  10. MustafaMotani

    Career Choices

    yeah we should continue.... bdw daredevil yu aiming for LUMS since it is in Lahore only..
  11. MustafaMotani

    Mathematics: Post your doubts here!

    j just multiply those terms that give u your desired term (X^3) in this case ... like in (1-3x)(1+2x)^6 multiply 1 by the term with x^3 in the expansion of (1+2x)^6 (prev part) and multiply -3x by the term with x^3 in the expansion of (1+2x)^6
  12. MustafaMotani

    Career Choices

    cuurrently cant say anything ...
  13. MustafaMotani

    Mathematics: Post your doubts here!

    then better not see it.. :P
  14. MustafaMotani

    Mathematics: Post your doubts here!

    syed1995 i dont know what codone means.. but i would recommend u give 27.. reason : if a=1.5 then second term = -7.5 (negative) since question clearly says that all the terms are positve i would recommend 27
  15. MustafaMotani

    Mathematics: Post your doubts here!

    daredevil .. lemme give yu a hint.. whenevr u get a tough question whch u think is out of syllabus... be sure that that question is the simplest one of all the questions in the paper
  16. MustafaMotani

    Mathematics: Post your doubts here!

    daredevil just insert n= 1 in that Sn equation
  17. MustafaMotani

    Mathematics: Post your doubts here!

    daredevil S1 = 9 when n=1 xD
  18. MustafaMotani

    Mathematics: Post your doubts here!

    anytime.. :P
  19. MustafaMotani

    Mathematics: Post your doubts here!

    Rutzaba i think u were lookin in wrong ms.. xD :P
  20. MustafaMotani

    Mathematics: Post your doubts here!

    7 (a) S n = n² + 8n. S 1 = 9 → a = 9 S2 = 20 → a + d = 11 → d = 2 (or equating n² + 8n with S n and comparing coefficients) B1 M1 A1 [3] co Realises that S 2 is a + (a + d). co (b) ara =− 9 30 2 arar =+ Eliminates a → 010133 2 rr =−+ or → 081572 2 aa =+− → r = ⅔ → a = 27...
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