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    (Original post by Skygon)
    Could anyone please guide me through an appropriate way to handle such questions? I get how the trapezium rule works but I have no idea how to set up the range of x values.



    Thanks in advance!

    Edit:- Only need help with part (b) and (c).

    For part c) you could just try integrating 1/2 - 1/2cos2x between pi/3 and 0 and that should give you an idea whether your answer is correct or not
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    What does the R next to some papers mean? Replacement or Regional?
    Last year across London did people sit the R paper? Since I heard it leaked last year aswell.

    ****ting myself becAUSE OF this leak bombaclart
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    (Original post by imfrassin)
    What does the R next to some papers mean? Replacement or Regional?
    Last year across London did people sit the R paper? Since I heard it leaked last year aswell.

    ****ting myself becAUSE OF this leak bombaclart
    It's just the paper international students sit because of time zones, usually it feels a bit harder than our Uk papers
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    (Original post by imfrassin)
    What does the R next to some papers mean? Replacement or Regional?
    Last year across London did people sit the R paper? Since I heard it leaked last year aswell.

    ****ting myself becAUSE OF this leak bombaclart
    it means replacement
    the international a level ones have a completely different spec and they have c1 and c2 together i think
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    (Original post by yasmin#2)
    it means replacement
    the international a level ones have a completely different spec and they have c1 and c2 together i think
    It means regional
    https://knowledgebase.edexcel.com/?p=1749

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    i guess you can use both formulas. its the same thing if im not wrong.
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    (Original post by usmanzubair)
    Make a physics unit 1 thread pls lol we have that before c2
    Hey what do you think the 6 marker will be on unit 1 physics?
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    (Original post by 1017bsquad)
    Hey what do you think the 6 marker will be on unit 1 physics?
    why not start a thread on this in the physics forum?
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    Hey guys,

    When you prove that something is a increasing function is it when f(x)' is >0 or >=0???



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    (Original post by Medicjug)
    Hey guys,

    When you prove that something is a increasing function is it when f(x)' is >0 or >=0???



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    f ' (x) > 0
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    (Original post by Skygon)
    f ' (x) > 0
    That's wha I thought too until in the Solomon paper they used f'(x) >=0


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    (Original post by yasmin#2)
    it means replacement
    the international a level ones have a completely different spec and they have c1 and c2 together i think
    No International A-Level has the same spec and we sit C1, C2, S1... Ect separately just like a normal A Level the exams are just different so we don't have to get up at 4am to make sure we are doing the exams at the same time as you
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    (Original post by Medicjug)
    That's wha I thought too until in the Solomon paper they used f'(x) >=0


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    The values of x that you find, are to be included as well. For example if you get x = 3 and -3, and then the inequality ends up being x < -3 and x > 3, 3 is to be included as well. Since f(x) will increase at that value too.
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    (Original post by Medicjug)
    That's wha I thought too until in the Solomon paper they used f'(x) >=0


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    That is strictly increasing. The f'(x)>0


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    so lets say the official c2 paper has been leaked, will we sit the regional instead?
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    (Original post by imfrassin)
    so lets say the official c2 paper has been leaked, will we sit the regional instead?
    Don't think so. All the papers get swapped.


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    (Original post by physicsmaths)
    That is strictly increasing.


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    So wait I'm a bit confused. You can write f'(x)>=0 as well as f'(x)>0? But you have to have inclusive inequalities for your x values


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    (Original post by Medicjug)
    So wait I'm a bit confused. You can write f'(x)>=0 as well as f'(x)>0? But you have to have inclusive inequalities for your x values


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    Could you show me the question.


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    (Original post by Medicjug)
    So wait I'm a bit confused. You can write f'(x)>=0 as well as f'(x)>0? But you have to have inclusive inequalities for your x values


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    This is the definitions
    If X_1>X_2 and f(X_1)>f(X_2) then this function is STRICTLY increasing. Ie F'(x)>0
    If X_1>X_2 and f(x_1)>=f(x_2) then this function is increasing in the interval ie f'(x)>=0



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    (Original post by Medicjug)
    So wait I'm a bit confused. You can write f'(x)>=0 as well as f'(x)>0? But you have to have inclusive inequalities for your x values


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    The two are different. When a function is increasing you say f'(x)>=0


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