Here's something I thought would be easy to prove (if I'm corret of course)
If -> x and x >a, then for infinitly many values of n.
My working: we need for n sufficently large
whatever I do I can't seem to deduce x_n > a for all but finite n
My second question is very simple. In the ratio test, if the limit does not exist what does limit superior greater than 1 imply?