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Math Help - Derivative

  1. #1
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    Derivative

    Hello I have a couple questions.

    1.) lim x -> 25 sqrt(x) - 5 / x - 25
    2.) [1/(x+3)]-1/3/x

    these two problems i have not been able to figure out how to solve, since the denominator equals 0 in both but there is an answer. any help works.


    thanks
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  2. #2
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    Quote Originally Posted by cokeclassic View Post
    Hello I have a couple questions.

    1.) lim x -> 25 sqrt(x) - 5 / x - 25
    2.) [1/(x+3)]-1/3/x

    these two problems i have not been able to figure out how to solve, since the denominator equals 0 in both but there is an answer. any help works.
    Hint for #1: \sqrt{x}-5=\frac{x-25}{\sqrt{x}+5}
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