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EDEXCEL C2 JUN 05 => HOW DID IT GO? watch

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    How Did You Guys Find The C2 Paper 2day?
    (this Is Early Because I Wanted 2 B Z First Person On Z Thread Muwahahaha)
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    The other threads more of an Answer thread. I dont know the paper was generally alrite nothing to special. Last question probably confused a few people who didnt think of getting equation of line PQ.

    Circles - Good
    Logs- good
    Trapezium rule- not bad
    geometric progression- good(thanks widowmaker for remindin every1 in revision thread or i would have totally never learnt it)
    intergration - tricky
    Sin Cos - Good (it was pretty gay that the range didnt really matter hopefully it was method marks though)
    bionomial expansion- good
    diffentiation - good
    Triangle stuff- good

    I probably lost random marks here and there. I cant gurantee myself about the trapezium rule was the range 0-20 i think my h was
    h=20/6.

    How about the last part on volume with the speed of water. I just did 120xarea got something in the 4000 doubt its correct though.
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    I did the same, apparently some people started using there answer for the previous area question and that doesn't make sense.
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    just to clarify- on the logs, after cancelling out log 2 did you get

    (x+1)/x=7

    x+1=7x

    1=6x

    x=1/6

    or something similar?
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    (Original post by mala2k)
    The other threads more of an Answer thread. I dont know the paper was generally alrite nothing to special. Last question probably confused a few people who didnt think of getting equation of line PQ.

    Circles - Good
    Logs- good
    Trapezium rule- not bad
    geometric progression- good(thanks widowmaker for remindin every1 in revision thread or i would have totally never learnt it)
    intergration - tricky
    Sin Cos - Good (it was pretty gay that the range didnt really matter hopefully it was method marks though)
    bionomial expansion- good
    diffentiation - good
    Triangle stuff- good

    I probably lost random marks here and there. I cant gurantee myself about the trapezium rule was the range 0-20 i think my h was
    h=20/6.

    How about the last part on volume with the speed of water. I just did 120xarea got something in the 4000 doubt its correct though.
    h was 20/5 (was in the formula book lol)

    i messed up the part c) as i put 30 x 41.39 (that rings a bell), instead of 120
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    i thought it wasnt that bad, although i messed up the integration question and only realised 1 minute before the end. how the hell do you prove y is increasing? i just put in random values of x higher than 2 and was like look! its increasing!
    i think i got the trig question the second part wrong. i was getting like sinx= 0.54 and then i was like thats ok then i tried to get sin-1 of x and it was like 0.5 so i thought thats not right and changed my calc to degrees lol. thats wrong i think i probably should have changed the radians into proper degrees?
    for the trapezium q i used h as 4. the b-a/n formula makes no sense to me as the mark schemes never agree. so i use the difference between the x points which works. this translates as b-a/ (n-1) for this one. the volume one i just did 60X 2 X my c.s. area. which i forget. all in all i think i got around 70% which is great as i hopefull only needed around 50% for an a.
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    yeh x was 1/6. im so happy i got a log question i could do.
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    (Original post by mongoose87)
    how the hell do you prove y is increasing? i just put in random values of x higher than 2 and was like look! its increasing!
    you couldve said that as x increases, 16/x³ decreases, and so that 2-16/x³ would be positive. i put something like that, cant think of how to put it algebraically
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    (Original post by matt.forster)
    you couldve said that as x increases, 16/x³ decreases, and so that 2-16/x³ would be positive. i put something like that, cant think of how to put it algebraically
    I was very easy just differentiate then if increasing make it >0 and work out x in a normal inequality equation.
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    hahaha i think c2 is very easy, i finished it in 45 minutes ( yawn), i think its much easier than c1 n m1 lol. i 'm not too sure how u do the binomial expansion ( the last part) where u have to find p n q.
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    HMm..

    I couldnt do the binomial exp either.

    The y increasing bit at the end.. I just proved that it was a turning point (grad=0)and a minimum...
    Not sure if thats a valid method tho.

    "
    How about the last part on volume with the speed of water. I just did 120xarea got something in the 4000 doubt its correct though."

    Sounds right to me, I got something like 3790 (in the high 3000s at least).



    I couldn't remember how to prove a geom series, or the equation of a circle etc (lost SO many marks on that, SO annoyed about that).
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    Does anyone know what the question was which involved using the sine rule? It asked us to find sin x but I think I ended up solving it too; hopefully it shouldn't be too much of a problem as I probably wrote down what sin x was along the way anyway.
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    i got about 5780 for volume of speed of water

    ms^-1 => convert to minutes
    multiply by area = 5780 ish
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    Circles - easy
    Logs- easy
    Trapezium rule- easy
    geometric progression- starred at it for 22 mins, finally clocked on and answered it, was a close shave!!
    intergration - easy, but room for silly mistakes
    Sin Cos - easy
    bionomial expansion- easy [when i came back to it - thanks widow maker giving me an example last week ]
    diffentiation - easy
    Triangle stuff- dodgy, may of messed 1 solution up [1 mark gone]
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    any body got are = 6.75
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    Very nice paper in my opinion.
    Harder than Jan05 though. 59-62 out of 75 for an A in my opinion.
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    Does anyone remember what they got for the trapezium rule? Cause, I somehow remember having to times the first part by 0, so all that was left was the 2( and the stuff inside the bracket)

    thanks
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    i think the grade boundary will be 62, i found it easier than jan'05. Maybe cause i'm better at it now, not sure.

    for trapezium rule

    i got values like

    1.200,1.600,3.something
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    (Original post by LondonBoy)
    Does anyone remember what they got for the trapezium rule? Cause, I somehow remember having to times the first part by 0, so all that was left was the 2( and the stuff inside the bracket)

    thanks
    i think i got 43.something, the sum of y1-yn-1 was around 10, and then it was multiplied by 2 twice
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    Trapezium Rule -sounds like what I got
 
 
 
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