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    Hey guys! :wavey:

    With only a day or two today before the C2 exams (across multiple boards), we have decided to make this thread for your last minute revision that you need to secure your wanted grade

    If you have any C2 questions, please post them here and someone will be able to help you out!

    Feel free to tag me in any questions you post so I can help as soon as possible if I'm around

    After-Exam Threads

    This thread will get very busy so if you ask a question and it isn't answered in 20 minutes then please start a new thread in the maths forum with your question.
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    Please try not to post a question without working out unless you are completely stuck.

    If you are completely stuck then first try to find a similar example, or in your post throw out your ideas.
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    (Original post by MKaur18)
    could you help me on how they got this:
    (x3/2)2 = x3

    is it because 1.5 times 2 = 3... :/ omg i'm legit so tired..
    Yes it's because 1.5 times 2 = 3

    But mainly because the two cancels with the 2 on the denominator of the fraction, since you have to multiply them together.
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    :scream:
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    The mark scheme makes no sense to me for Question 13 b)

    I thought the 1/2 to the power of x could be 2 to the power of -x. please help
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    (Original post by wantodothebest)
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    The mark scheme makes no sense to me for Question 13 b)

    I thought the 1/2 to the power of x could be 2 to the power of -x. please help
    dude,
    13b is a hidden quadratic, maybe substituting that  u = 2^x would be advisable
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    (Original post by Whitefeather)
    Hey,
    Any idea what areas/volumes we should learn for our exam? For differentiation.
    Please help!
    What do you mean by this
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    This thread is exactly what I need to be part of!
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    this thread is going to be a C2 style Mecca soon,
    many questions etc
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    (Original post by ThatsAGoodOne349)
    dude,
    13b is a hidden quadratic, maybe substituting that  u = 2^x would be advisable
    It says show that, not solve.

    How to I get from 2^x + 1 = (1/2)^x to the quadratic?

    The mark scheme doesnt show anything to do with a quadratic
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    (Original post by wantodothebest)
    It says show that, not solve.

    How to I get from 2^x + 1 = (1/2)^x to the quadratic?

    The mark scheme doesnt show anything to do with a quadratic
    \frac{1}{2}=2^{-1}

    Apply an index law

    Then mult through by 2^x.
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    (Original post by wantodothebest)
    It says show that, not solve.

    How to I get from 2^x + 1 = (1/2)^x to the quadratic?

    The mark scheme doesnt show anything to do with a quadratic
    2^x +1 = (\frac{1}{2})^x

    You just contradicted yourself...
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    (Original post by RDKGames)
    \frac{1}{2}=2^{-1}

    Apply an index law

    Then mult through by 2^x.
    But it you mutliple by 2 to the power x, why doesn't the one become 2 to the power x. Mark scheme confusing me
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    (Original post by ThatsAGoodOne349)
    2^x +1 = (\frac{1}{2})^x

    You just contradicted yourself...
    Sorry! Just panicking a bit because Im usually good at logs and this is a logs worksheet
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    (Original post by wantodothebest)

    But it you mutliple by 2 to the power x, why doesn't the one become 2 to the power x. Mark scheme confusing me
    Because 1\cdot 2^x = 2^x ...
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    haha I remember doing C2 in 2015, back when life was easy
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    (Original post by RDKGames)
    Because 1\cdot 2^x = 2^x ...
    Oh sorry! yeah I just tried it again, thank you!

    I was being silly
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    Can I get a hint on how to start this?

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    can someone pls give me the answers to these questions
    http://www.m4ths.com/uploads/3/2/7/4...ponentials.pdf
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    Could someone pls tell me all of the area/volume/cross section formula for every shape included c2
 
 
 
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