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Math Help - exponent problem

  1. #1
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    Question exponent problem

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    Last edited by Revelsyn; October 13th 2008 at 07:17 AM.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Revelsyn View Post
    I'm having some trouble with this one; I'm not sure how to multiply the neg n by the exponent "1 + n"

    "evaluate."

    2-n(2n - 21+n)

    ~everything in red is an exponent/the answer is suposed to be -1..
    when multiplying numbers of the same base, we add the powers. that is,

    \displaystyle x^a \times x^b = x^{a + b}

    Note, 2^{-n} \left( 2^n - 2^{1 + n} \right) = 2^{-n} \cdot 2^n - 2^{-n} \cdot 2^{1 + n}

    Now continue using the rule above
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  3. #3
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    Smile

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    Last edited by Revelsyn; October 13th 2008 at 07:16 AM.
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  4. #4
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    Didn't we see this before?
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    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Krizalid View Post
    Didn't we see this before?
    It does look remarkably familiar doesn't it?

    Revelsyn, if you have questions about an answer to your question, you should post it in the original thread.

    -Dan
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    Last edited by Revelsyn; October 13th 2008 at 07:16 AM.
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