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Math Help - logarithm as exponent

  1. #1
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    logarithm as exponent

    How do I enter a logarithm as an exponent?
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  2. #2
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    Quote Originally Posted by alyosha2 View Post
    How do I enter a logarithm as an exponent?
    [tex]x^{log_b (x)}[/tex] gives x^{log_b (x)}
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  3. #3
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    when using

    x^{log n-1}

    <br />
x^{log n-1}<br />

    how do i keep the space beween log and n?
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  4. #4
    Super Member flyingsquirrel's Avatar
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    Quote Originally Posted by alyosha2 View Post
    how do i keep the space beween log and n?
    Use "\log" instead of "log" : x^{\log n-1} gives x^{\log n-1}. However \log n-1 is ambiguous because it can mean \log (n)-1 or \log(n-1) ; you'd better add parenthesis.
    Last edited by flyingsquirrel; June 22nd 2009 at 07:54 AM.
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  5. #5
    Senior Member Stroodle's Avatar
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    you can also type \; to make a space

    e.g. x^{log\;n-1} =x^{log\;n-1}
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  6. #6
    Grand Panjandrum
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    Quote Originally Posted by Stroodle View Post
    you can also type \; to make a space

    e.g. x^{log\;n-1} =x^{log\;n-1}
    or "~" or "\ ", or ...

    I have four different space codes for math mode on my quick reference card, and I know that that list is not exhaustive.

    CB
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  7. #7
    Senior Member TheAbstractionist's Avatar
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    \, (backslash + comma) gives a small space, \ (backslash + space) gives a medium space while \quad gives a large space.

    Code:
    a \, b
    a \ b
    a \quad b
    a\,b
    a\ b
    a\quad b


    The small space is particularly useful for formatting integrals:

    Code:
    \int \sin x \, dx
    \int\sin x\,dx
    certainly looks neater than \int\sin xdx.
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