Cie pure maths , oct/nov 9709 12

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    (Original post by mat7276)
    It went great for me. The paper was pretty short, 10 questions only. The question on binomial expansion was a bit surprising.


    How about you ?
    1) for the first ans, ( equation of the curve ) c= -7 2)tan 2x = 3 , x=-54.2 , 35.8 for the other trigonometry , x= 7/12 pie , 11/12 pie 3) for the AP : i) 15th day = 130km ii) on 20th may for the gp i) r = 1/2 , a=16 ii) sum to infinity =30 4) for the binomial, n=6 , coefficient x^2 = 5.25 or 21/4
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    guys i forgot to write the number of the question i answered , will i get any marks ?
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    (Original post by irenee)
    hmm do you perhaps remember thefirst bracket in the binomial q?
    (3-2x)(1+x/2)^n
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    (Original post by chillaxxerr)
    guys i forgot to write the number of the question i answered , will i get any marks ?
    Don't worry you will get marks for getting correct answers, they will only reduce few marks for penalty...
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    Can someone explain the Binomial question to me? so annoyed to drain 6 marks like that. Usually find them so simple but this one..... naaahhh.
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    (Original post by FunkyBanana)
    Can someone explain the Binomial question to me? so annoyed to drain 6 marks like that. Usually find them so simple but this one..... naaahhh.
    It's difficult to explain on here.

    For the coefficient of x you get:

    (n:1)*(x/2)*(1)^(n-1)*3
    (n:0)*(x/2)*(1)^n*(-2x)

    (n:1) and (n:0) represent the factorial formula

    You no that (n:1) has to be n (you can check with calculator)
    You also know that (n:0) is 1.

    Add both formulas and say it's equal to 7 (I think it was 7)
    You should get n=6
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    What value for p did you get in the vector question? And what was your angle?
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    (Original post by LumpTime)
    What value for p did you get in the vector question? And what was your angle?
    Around 130s or 120s can't remember now
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    I think the p was 2.75
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    Hey Guys check out this,
    https://justpastpapers.com/
    Unofficial mark schemes have been released..
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    How was the mechanics ?
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    (Original post by IGIAN)
    How was the mechanics ?
    it was insanely tough, had to leave out 11 marks .
 
 
 
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