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Edexcel Core 3 - 21st June 2016 AM Watch

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    (Original post by imran_)
    https://a086a5a2f39bda93734c56a63fab...%20Edexcel.pdf

    hi for question 4b i need help for the range. So far ive subbed 0 into it to get g(x)<= 3

    but i dont understand how the other value is calculated
    What's the horizontal asymptote?
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    (Original post by Zacken)
    What's the horizontal asymptote?
    it tends to 0
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    (Original post by imran_)
    it tends to 0
    Uh, no it doesn't, have a think about it.
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    (Original post by Zacken)
    Uh, no it doesn't, have a think about it.
    it tends to infinity
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    (Original post by imran_)
    it tends to infinity
    Are you even bothering or just making random guesses?
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    (Original post by imran_)
    it tends to infinity
    Substitute in a really large value of x, what number do you get close to?
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    (Original post by Zacken)
    Are you even bothering or just making random guesses?
    from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding
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    (Original post by imran_)
    from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding
    Don't do it by observation. Do his method as he said above
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    (Original post by imran_)
    from what I can see, the asymptote is going towards the x axis. Theres a reason why I asked for help on this question as i have limited understanding
    Sub in a really large value of x, what number do you get close to?
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    (Original post by Zacken)
    Substitute in a really large value of x, what number do you get close to?
    gets closer to 0.5, is this the actual method to use? or is there an alternative approach
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    (Original post by imran_)
    gets closer to 0.5, is this the actual method to use? or is there an alternative approach
    The alternative method to use is \displaystyle \lim_{x \to \infty} \frac{x+9}{2x+3} = \lim_{x\to \infty} \frac{1 + \frac{9}{x}}{2 + \frac{3}{x}} = \frac{1}{2}
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    Name:  _IYGB 4.jpg
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    http://www.thestudentroom.co.uk/show....php?t=3361867
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    what does iygb stand for
    • Very Important Poster
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    (Original post by boyyo)
    what does iygb stand for
    My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still )
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    (Original post by SeanFM)
    My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still )
    if you got...brains?
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    (Original post by 13 1 20 8 42)
    if you got...brains?
    :mmm: I fancy your suggestion better than mine
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    (Original post by SeanFM)
    My guess is 'if you're (a) gonad buster'? (I know it's buster gonad, but still )
    (Original post by 13 1 20 8 42)
    if you got...brains?
    LOL yh I think that makes more sense
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    How hard are the AEA meant to be compared to the c3/c4 exams?


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    (Original post by ben_urwinator)
    How hard are the AEA meant to be compared to the c3/c4 exams?


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    Quite a bit more difficult
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    Can anyone please explain why the square root of e^-2x is e^-x Thanks

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