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    (Original post by Mystery.)
    help with this q?

    I have tried to understand the marking scheme so many times but I just don't get it.
    If you don't understand the mark scheme answer, what is the first step in the scheme that you don't follow?
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    I was wondering if someone could help me with question 2 on the 2013 paper. https://www.maths.ox.ac.uk/system/fi...nts/test13.pdf

    I am able to do i but I do not understand any part of iii
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    (Original post by lightbulbmoment_)
    Do you mean (ii)?
    Yeah, my bad.
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    (Original post by Mystery.)
    help with this q?

    I have tried to understand the marking scheme so many times but I just don't get it.

    seems like it won't let me load the attachment but its 2011 1G?
    Consider what y = x^2-1 will look like - between -1 and 1. y will always be between -1 and 0. So look at y = f(x), between -1 and 0. You can form an equation for that section of the function - it's just f(x) = x + 1 (if you're not sure how to get this, look at the points (-1,0) and (0,1). So f(x^2 - 1) = x^2, so we're integrating from -1 to 1 x^2 with respect to x, giving us an area of 2/3.
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    (Original post by lightbulbmoment_)
    Alright, part (i) basically gives you the 'trick' to do (a) and (b).

    For (a) try making the substitution for g(t) before following the same process as in (i); since you're trying to show that there is no function that will work in this situation, you want to end up with something that is impossible.

    Part (b) is very similar again - this time you have no specific function g but as before think about what you did in part (i).

    Part (c) was a bit trickier, after spending some time on it I noticed that f(t) = [g(t)]/2 works, and it is also quite easy to verify. I guess this was more me just noticing the answer, I'm not sure if there's a better way of arriving there.
    How did you verify c?

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    (Original post by Mystery.)
    help with this q?

    I have tried to understand the marking scheme so many times but I just don't get it.

    seems like it won't let me load the attachment but its 2011 1G?
    Split the integral up into 2 different integrals. -1 --> 0 and 0-->1
    From -1 to 0 the line is Y=X+1 and after that y=-x+1
    therefore from -1 to 0 you want to integrate (x+1)2 -1
    and for 0 to 1 you want to integrate (-x+1)2 -1
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    38 and 3/4 hours to go people. How is everyone feeling?
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    I feel like this ones very obvious but please could someone explain

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    [QUOTE=theaverage;68315274]I feel like this ones very obvious but please could someone explain

    Posted from TSR Mobile[/QUOT
    I got f(x)-f(0) was that answer?
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    [QUOTE=Nonamebzja;68315788]
    (Original post by theaverage)
    I feel like this ones very obvious but please could someone explain

    Posted from TSR Mobile[/QUOT
    I got f(x)-f(0) was that answer?
    What's your method?
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    [QUOTE=joodaa;68315824]
    (Original post by Nonamebzja)
    What's your method?
    Not really a method felt like cheating i just saif F(x)=X^2 so f(x) must equal 2t cuz when u integrate that between x and 0 it equals X^2
    And dy/dx of X^2 is 2x which is f(x)-f(0) [subbing values in 2t f(x)]
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    [QUOTE=Nonamebzja;68315928]
    (Original post by joodaa)

    Not really a method felt like cheating i just saif F(x)=X^2 so f(x) must equal 2t cuz when u integrate that between x and 0 it equals X^2
    And dy/dx of X^2 is 2x which is f(x)-f(0) [subbing values in 2t f(x)]
    ooo thats saucy thanks lad didnt think of that
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    How did you guys solve this?
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    [QUOTE=joodaa;68316024]
    (Original post by Nonamebzja)
    ooo thats saucy thanks lad didnt think of that
    Np
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    Hey, anyone else going for Oxford Maths/Comp Sci?

    Also good luck everyone. I know I'll need it :/
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    This may seem like a really stupid question, but I have been doing all my working and answers on lined paper, but when it comes to the real thing on Wednesday, is there a booklet given to write in or do we need to write in the blank pages of the exam booklet?
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    (Original post by Moogle679)
    This may seem like a really stupid question, but I have been doing all my working and answers on lined paper, but when it comes to the real thing on Wednesday, is there a booklet given to write in or do we need to write in the blank pages of the exam booklet?
    You write your answer in the black spaces.
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    Any last minute things you guys can suggest to prepare?
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    (Original post by BPricey)
    You write your answer in the black spaces.
    Thank you
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    (Original post by Nonamebzja)
    How did you guys solve this?
    Solve what?
 
 
 
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