Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solving infinite limit at infinity

  1. May 30, 2010 #1


    User Avatar

    Solving infinite limit at infinity[solved]

    Really need help here. I somehow missed a fundamental principle and I have an Analysis exam tomorrow

    I need to use this definition for [tex]lim_{n\rightarrow\infty}a_{n}=-\infty[/tex]:

    For all A<0 there exists [tex]K_{A}>0[/tex],
    such that f(x)<A. I perfectly understand this.

    Now i need to use it to show:
    I can do it for a specific case using the definition, like for n>=2 its clear that f(x) will be less than 0, using the definition. But I am not sure that this is a general proof. I.e. that doesn't show that f(x) will tend to infinity.

    [ok I solved it and dont know how to delete the post so ya. shud have checked out "related threads" before posting sorry]
    Last edited by a moderator: May 31, 2010
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted