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Ocr (mei) c2 exam paper 18/05

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    123
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    This is great thanks, do you have the first two questions as well?
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    Forgot to add it , give me a sec guy

    //Done Added
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    Awesome
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    some smart person do an unnficial markscheme please
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    I'll probably try and make one soon.
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    Also in question 7, what is the 6x to the power to? It's too fuzzy and I can't read it.
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    what was the answer to the log question?
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    y=100x^3
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    (Original post by Axion)
    y=100x^3
    I got y= x^3 + 100 :confused: Dunno where I went wrong!
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    (Original post by treeman1)
    Also in question 7, what is the 6x to the power to? It's too fuzzy and I can't read it.
    Think it was 6^1/2 If im not mistaken
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    (Original post by cabluigi)
    I got y= x^3 + 100 :confused: Dunno where I went wrong!
    I think you will only lose 1 mark.

    you kept the + in there when you should of multiplied. Log(3) + log(2) = log(6)

    essentialy the formula was in the form of y=kx^n which is the same as
    logy=logk +nlogx
    y = c + mx
    logk=2
    k=100
    n=3

    so if you simplify logy=logk +nlogx we get .... logy=log(kx^n) ..... get rid of the logs.... y=kx^n ...... therefore y=100x^3




    Im not great at explaining maths sorry
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    i dont see how a straight line can be x^3? can some1 explain pls?
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    yeah i got y=10^3x+2 is that just completely wrong? haha
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    (Original post by Polioz)
    I think you will only lose 1 mark.

    you kept the + in there when you should of multiplied. Log(3) + log(2) = log(6)

    essentialy the formula was in the form of y=kx^n which is the same as
    logy=logk +nlog
    ( the form we were given )

    Im not great at explaining maths sorry
    Hopefully you're right, I wouldn't mind losing a mark there
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    (Original post by posting)
    i dont see how a straight line can be x^3? can some1 explain pls?
    it wasnt a straight line. the axes were logy and logx which form a straight line.

    I lost 5 marks so dw :P
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    what did people write for question for, y=3fx and y=f4x?
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    (6,9) and (1.5,3) is what i got, not sure if that's right though
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    (Original post by Polioz)
    Think it was 6^1/2 If im not mistaken
    Yeah I'm pretty sure it's that. I just redid the question and I got the same answer as I did in the exam so it must be a half.
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    (Original post by maths.igcse)
    (6,9) and (1.5,3) is what i got, not sure if that's right though
    i got that too

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