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Math Help - [SOLVED] Correct Simplifaction?

  1. #1
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    [SOLVED] Correct Simplifaction?

    Once again this is one of these things were it just absolutely confuses me

    Example

    n^{\frac{3}{2}}\sqrt{n-1}

    I want to factor out a n^2, is this a correct way? I dont believe it is but however, I need to know simple things like this

    n^1n^{\frac{1}{2}}\sqrt{n-1}

    n(n(n-1))^{\frac{1}{2}}

    n^2(1-\frac{1}{n})^{\frac{1}{2}}

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  2. #2
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    Quote Originally Posted by RockHard View Post
    Once again this is one of these things were it just absolutely confuses me

    Example

    n^{\frac{3}{2}}\sqrt{n-1}

    I want to factor out a n^2, is this a correct way?
    ...
    n^2(1-\frac{1}{n})^{\frac{1}{2}} <<<< OK
    ...
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  3. #3
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    Is that an OK, as in wth I did? Or as in that is fine? lol

    or this way

    n^{\frac{3}{2}}({n-1})^{\frac{1}{2}}

    ({n^4-n^3})^{\frac{1}{2}}

    Factoring out a n^4 and from the parenthesis because the square root of anything to a power of 4 is just the item squared?

    n^2({1-\frac{1}{n}})^{\frac{1}{2}}
    Last edited by RockHard; November 29th 2009 at 12:48 AM.
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  4. #4
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    Quote Originally Posted by RockHard View Post
    Is that an OK, as in wth I did? Or as in that is fine? lol

    or this way

    n^{\frac{3}{2}}({n-1})^{\frac{1}{2}}

    ({n^4-n^3})^{\frac{1}{2}}

    Factoring out a n^4 and from the parenthesis because the square root of anything to a power of 4 is just the item squared?

    n^2({1-\frac{1}{n}})^{\frac{1}{2}}
    What you did was OK, the result was OK - and: There may be a lot more ways to do this simplification. So choose that way which you know best!
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  5. #5
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    Could you provide your input of the problem so I can get a view of your method if it differs, it may prove simpler for me to remember and etc...marking as solve anyway though
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