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Math Help - can you solve this

  1. #1
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    can you solve this

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  2. #2
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    I'm not 100% sure what the question is asking but I would suggest with

    f(x) = \frac{2^{n}-5^{n+1}}{3^{n}+5^{n}} as n \to \infty then f(x) \to -1
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  3. #3
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    Quote Originally Posted by fearsking View Post
    Divide the numerator and denominator of the expression by 5^n:

    \lim_{n \rightarrow + \infty} \frac{ \left( \frac{2}{5}\right)^n - 5}{\left( \frac{3}{5}\right)^n + 1}.

    Now consider the limit. You get -5 as the answer.
    Last edited by mr fantastic; September 11th 2009 at 04:45 AM. Reason: Fixed a typo.
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  4. #4
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    Hi mr fantastic

    I think there's typo in your denominator
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  5. #5
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    thanx every body

    i think mr fantastic is right
    thanx
    guys
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  6. #6
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    Quote Originally Posted by songoku View Post
    Hi mr fantastic

    I think there's typo in your denominator
    Thanks. There was. I've fixed it.
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