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    Need help on this question pls

    x(2x^{-1/4})^4
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    (Original post by Skaterkid)
    Need help on this question pls

    x(2x^{-1/4})^4
    Here's the first step:
    x\times2^4x^{-1/4^{4}}
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    (Original post by Bakes0011)
    Here's the first step:
    x\times2^4x^{-1/4^{4}}
    16x^{-1/4} X  x^1
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    x(2x^-1/4))^4=x(2^4)(1/x^(1/4 x4))
    =x(16)(1/x)

    look again, Skaterkid - i should have put x^-1/4, as it now is above.

    if you do the bracket first, what`s inside it is: 16/(x^1/4)^4 because the exponent of x is negative, and: 1/a=a^-1, so, 1/a^(1/4)=a^(-1/4)
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    still dont understand how the answer is 16 or 2 to the power 4
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    (Original post by Skaterkid)
    Need help on this question pls

    x(2x^{-1/4})^4
    x(16x^-1)

    16x / x = 16.
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    okay forgot the x in the question for now, put it in later.
    when you're doing (2x^{-1/4})^4 its basically like doing (2^4  (x^{-1/4})^4) and multiply that by x.
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    (Original post by Skaterkid)
    16x^{-1/4} X  x^1
    No, you got the 16x bit right, but it's x^{-1/4^{4}}, which is the same as x^{4\times -1/4}.

    {mod: full solution removed}
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    What was the original question??????
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    You call that basic!? :eek:
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    (Original post by YorkieLad101)
    You call that basic!? :eek:
    exactly what I was thinking hahaha! I can't deal with maths.... :///
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    (Original post by Skaterkid)
    Need help on this question pls

    x(2x^{-1/4})^4
    Is that from an edexcel C1 past paper? Because I'm pretty sure that was the first question of my C1 exam.
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    (Original post by YorkieLad101)
    You call that basic!? :eek:
    Assuming the question is asking you to simplify the expression, it can be done with two pieces of info you learn at GCSE level about the rules of indices and essentially 2-3 'moves' raising to powers.
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    (Original post by MissBrown)
    Assuming the question is asking you to simplify the expression, it can be done with two pieces of info you learn at GCSE level about the rules of indices and essentially 2-3 'moves' raising to powers.
    errr excuse me? that makes no sense!
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    (Original post by YorkieLad101)
    errr excuse me? that makes no sense!
    It makes no sense to you for one of the following reasons:

    (i) You have not yet been exposed to higher mathematics at GCSE
    (ii) You didnt understand or learn it when taught

    Either way, Im not quite sure why you would post in a mathematics forum that goes through to University level with a comment such as "you call that basic"
    For many it will be very basic which I feel you may need to appreciate when posting in such fora.
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    (Original post by YorkieLad101)
    errr excuse me? that makes no sense!
    Read up on how to work with indices (Any GCSE text will do - it starts toward the top range of Foundation, but some is also in Higher Tier as well) It is quite simple once you have done it a couple of times
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    (Original post by MissBrown)
    Either way, Im not quite sure why you would post in a mathematics forum that goes through to University level with a comment such as "you call that basic"
    For many it will be very basic which I feel you may need to appreciate when posting in such fora.
    because i can!
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    (Original post by lubus)
    x(16x^-1)

    16x / x = 16.
    This. Please explain it though how you got to this so OP understands
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    (Original post by YorkieLad101)
    because i can!
    I think I shall leave it there
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    (Original post by MissBrown)
    I think I shall leave it there
    cheers for that!
 
 
 
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