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    I have no idea what you are doing

    The power needs to increase from -2 to -1

    You need to divide by the new power

    Also, in order to reverse the chain rule you need to divide by 2



    Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)



    You may find it easier to write the integrand as (2x+1)^(-2) at the start
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    (Original post by TenOfThem)
    I have no idea what you are doing

    The power needs to increase from -2 to -1

    You need to divide by the new power

    Also, in order to reverse the chain rule you need to divide by 2



    Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)



    You may find it easier to write the integrand as (2x+1)^(-2) at the start
    Thanks. I understand it now. I've just got one meow question regarding this: could I use ln to work this out?


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    (Original post by TenOfThem)
    I have no idea what you are doing

    The power needs to increase from -2 to -1

    You need to divide by the new power

    Also, in order to reverse the chain rule you need to divide by 2



    Edit .... I see what you are doing ... You can not just differentiate something in a denominator and get that in the denominator ... You should know how to differentiate (2x+1)^(-1)



    You may find it easier to write the integrand as (2x+1)^(-2) at the start
    In exams, would I be using the reverse chain rule more often than the given formulas for integration?


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    (Original post by ps1265A)
    Thanks. I understand it now. I've just got one meow question regarding this: could I use ln to work this out?


    Posted from TSR Mobile
    No

    (Original post by ps1265A)
    In exams, would I be using the reverse chain rule more often than the given formulas for integration?


    Posted from TSR Mobile
    No
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    (Original post by TenOfThem)
    No



    No
    So I should start using the formulas from now?


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    (Original post by ps1265A)
    So I should start using the formulas from now?


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    I am not sure what you are asking
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    (Original post by TenOfThem)
    I am not sure what you are asking
    You said that I would be using integration formulas (the standards) in exams compared to the reverse chain rule. So should I start using the formulas when I'm practicing questions?


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    (Original post by ps1265A)
    You said that I would be using integration formulas (the standards) in exams compared to the reverse chain rule. So should I start using the formulas when I'm practicing questions?


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    You use whatever the question needs .... In the exam you will have 2-4 integrations.

    You need to practice all of the methods.
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    (Original post by TenOfThem)
    You use whatever the question needs .... In the exam you will have 2-4 integrations.

    You need to practice all of the methods.
    Alright thanks, I think my question was too general and in fact, I may have to use a combination of both


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