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Composition of limits where outer function and inner function depend on the same variable


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$begingroup$


Let $f(x,y)$ and $g(x)$ be functions such that





  1. $lim_{xrightarrow x_0} g(x) = G$.


  2. $g(x) ne G$ for all values of $x$ in a punctured neighborhood of $x=x_0$.


  3. $f(x,y)$ is continuous at all points where $xne x_0$.


Are these sufficient conditions to assert the following equality?



$$lim_{x rightarrow x_0} f(x,g(x)) = lim_{x rightarrow x_0} f(x,G)$$



If not, what would be sufficient conditions?










share|cite|improve this question









$endgroup$

















    0












    $begingroup$


    Let $f(x,y)$ and $g(x)$ be functions such that





    1. $lim_{xrightarrow x_0} g(x) = G$.


    2. $g(x) ne G$ for all values of $x$ in a punctured neighborhood of $x=x_0$.


    3. $f(x,y)$ is continuous at all points where $xne x_0$.


    Are these sufficient conditions to assert the following equality?



    $$lim_{x rightarrow x_0} f(x,g(x)) = lim_{x rightarrow x_0} f(x,G)$$



    If not, what would be sufficient conditions?










    share|cite|improve this question









    $endgroup$















      0












      0








      0





      $begingroup$


      Let $f(x,y)$ and $g(x)$ be functions such that





      1. $lim_{xrightarrow x_0} g(x) = G$.


      2. $g(x) ne G$ for all values of $x$ in a punctured neighborhood of $x=x_0$.


      3. $f(x,y)$ is continuous at all points where $xne x_0$.


      Are these sufficient conditions to assert the following equality?



      $$lim_{x rightarrow x_0} f(x,g(x)) = lim_{x rightarrow x_0} f(x,G)$$



      If not, what would be sufficient conditions?










      share|cite|improve this question









      $endgroup$




      Let $f(x,y)$ and $g(x)$ be functions such that





      1. $lim_{xrightarrow x_0} g(x) = G$.


      2. $g(x) ne G$ for all values of $x$ in a punctured neighborhood of $x=x_0$.


      3. $f(x,y)$ is continuous at all points where $xne x_0$.


      Are these sufficient conditions to assert the following equality?



      $$lim_{x rightarrow x_0} f(x,g(x)) = lim_{x rightarrow x_0} f(x,G)$$



      If not, what would be sufficient conditions?







      limits






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Mar 10 at 3:26









      Trevor KafkaTrevor Kafka

      5308




      5308






















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