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Math Help - glb and lub

  1. March 16th 2010, 11:35 AM #1
    jpquinn91
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    glb and lub

    How can I find the glb and lub of:

    (n^2+17n)^1/2 -(n^2+8n)^1/2

    Thanks

    Sorry, dont know if these are standard abbreviations but i mean greatest lower bound and least upper bound
    Last edited by jpquinn91; March 16th 2010 at 03:15 PM.
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  2. March 18th 2010, 03:58 PM #2
    chiph588@
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    (n^2+17n)^1/2 -(n^2+8n)^1/2 obtains its global minimum at n=-17

    to find the lub, find the limit as n goes to infinity.
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