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Math Help - Calculating limit

  1. #1
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    Calculating limit

    Not sure how to do this limit, I was thinking of rationalizing the denominator but that didn't work.


    \lim_{x \to -4} \frac{1}{\sqrt{x^2+16}}
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  2. #2
    MHF Contributor

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    There is no reason to do that.
    \displaystyle \lim _{x \to  - 4} \sqrt {x^2  + 16}  = 4\sqrt 2
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