Monday, June 26, 2017

real analysis - leftfrac1f(xn)right converges to frac1f(x).

Let f:RR be a continuous function. Let {xn}n=1 be a convergent sequence in R with limnxn=x and f(x)0



I want to show that {1f(xn)} converges to 1f(x).



Now It would seem I have:




|f(xn)f(x)|<ϵ


|f(xn)f(x)||f(xn)||f(x)|



and now I don't get it, I would expect to get some relationship also less than epsilon, times by 1 to inverse the epsilon inequality and then find a way to get the ricipricals and that would reverse the epsilon inequality again giving me the result, but I can't see it.

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