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C3 ocr mei june 21st 2012

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    (Original post by hprmc)
    hhaha... how did you get your 1.5 ? cos i actually got -1.5 haha. im scared ive lost all the marks for the question
    I got -1.5 by integrating tangent, then integrating the original graph, then taking the area of the graph away from the tangent.
    How can you have negative area?
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    (Original post by verello12)
    How can you have negative area?
    It is acceptable to have a negative value for the area, it just represents area in the negative axi but as area can only be positive you just ignore the negative sign.


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    (Original post by ray_charlene)
    BTW, what did you guys get for the coursework?
    I got 16/18, made me feel a bit relieved after C4 exam because I left a few answers in section B blank, the coursework might not be helping too much but better than nothing.
    Haha snap I also got 16/18

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    Have a feeling that an A-60/72 LOL I still made a few silly mistakes does anyone have the paper please I'm sure everyone would like it just to count up their marks
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    (Original post by Funkyhouse)
    Have a feeling that an A-60/72 LOL I still made a few silly mistakes does anyone have the paper please I'm sure everyone would like it just to count up their marks
    There's a full markscheme around page 7


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    (Original post by themath)
    There's a full markscheme around page 7


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    Oh yh thank yo u i've seen it i just wanted to see the marks per question
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    Hey guys, I reckon I perhaps got about 60/72 in this core 3 paper and approximately 73/90 in core 4. What UMS and grades will those marks give me do you think? Grade boundaries are quite unpredictable from year on year. I reallllllllllyyyyyyy need an A in A2.
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    (Original post by Jam')
    By proof they were looking for a general case. If f(x)=g(x) then f(x)g(x) = f2(x) so you haven't proven much tbh and your conclusions cannot be extended to a general case; what if f(x) =/= g(x); does it still work?
    yours still isnt right its because both f(x) and g(x) are odd so f(-x)=-f(x) and g(-x)=-g(x)
    and so p(-x)= -f(x) * -g(x)= f(x)g(x)=p(x)
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    Hey guys, I am also doing c3, if u need any help just send a post, I would love to help u, If I could not help then the other students on this forum might help. I know this is quite late now, but I am going to attach a file that u might find very useful.
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    (Original post by yeahmon123)
    Hey guys, I reckon I perhaps got about 60/72 in this core 3 paper and approximately 73/90 in core 4. What UMS and grades will those marks give me do you think? Grade boundaries are quite unpredictable from year on year. I reallllllllllyyyyyyy need an A in A2.
    What did you get in the coursework? if you got 15 considering that many people found it ok/easy then prob an A-80ums. C4 I think you are probably looking at definitely an A but somewhere between maybe 82-86 ums (or possibly more i;m using that an a-70/90) But I', 80% sure you got an A for both these exams. Same i predicted i got like 60/72 (silly mistakes cost me LOL)
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    (Original post by Aaqil)
    Hey guys, I am also doing c3, if u need any help just send a post, I would love to help u, If I could not help then the other students on this forum might help. I know this is quite late now, but I am going to attach a file that u might find very useful.
    Aw thanks do you have the paper by any chance?
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    is there ANY chance that the grade boundaries will be 54 for an A? :/
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    (Original post by Polioz)
    if the thread has 23487923 replies , it was a hard paper and everyone rushes to tsr to hope everyone else found it hard for reasurance. If its easy, ppl just go meh and go off and carry on living .
    Haha true I have a feeling the exam will bite us later though, with painfully high grade boundaries
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    (Original post by Funkyhouse)
    What did you get in the coursework? if you got 15 considering that many people found it ok/easy then prob an A-80ums. C4 I think you are probably looking at definitely an A but somewhere between maybe 82-86 ums (or possibly more i;m using that an a-70/90) But I', 80% sure you got an A for both these exams. Same i predicted i got like 60/72 (silly mistakes cost me LOL)
    OMG Thanks you've made my day lol, yeah I got 15 on the coursework. Haha same I hate it when that happens, when the daft mistakes cost you crucial marks, you go in all prepared and then come out feeling like an idiot.
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    (Original post by yeahmon123)
    OMG Thanks you've made my day lol, yeah I got 15 on the coursework. Haha same I hate it when that happens, when the daft mistakes cost you crucial marks, you go in all prepared and then come out feeling like an idiot.
    Exactly but even if i scrape an A I will still be very happy Have a happy summer :party2:
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    (Original post by Funkyhouse)
    Exactly but even if i scrape an A I will still be very happy Have a happy summer :party2:
    SAME!!! And you too
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    This was a much easier paper than Jan, the only question I couldn't do was the proof ones so I left them out. Lost easy marks on the two 7 markers though, hopefully scrape 3 or 4 out of 7 on each and that'll be a solid ~60/72 paper.
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    Anyone got the paper?
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    Hi guys,

    I know it sounds stupid now but for 9i) what are the co ordinates for P after the transformation y = 2f(x)?

    I left them as they were as i thought they wouldn't change but a few people have said they just multiplied the y coordinate by 2 but surely that would be y = f(x) + 2.

    Any help?
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    (Original post by James4821)
    Hi guys,

    I know it sounds stupid now but for 9i) what are the co ordinates for P after the transformation y = 2f(x)?

    I left them as they were as i thought they wouldn't change but a few people have said they just multiplied the y coordinate by 2 but surely that would be y = f(x) + 2.

    Any help?
    y=2f(x) -> stretch in the y-axis, scale factor 2, so yes, you multiply by 2.

    y=f(x)+2 -> translation by 2 units in the positive y-direction.

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