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One-sided limits


How can someone find a ONE-SIDED limit?  For example, finding the limit as
x->0+ and as x->0-.  The zero case can be fudged by substituting (1/x) for
every occurrence of x and then using directional +/- Infinity.  How can one do
this for the non-zero case?

Thanks,
Lyle Wright
Mathematica Developer
Harvey Mudd College
Claremont, CA 91711
lwright at hmcvax.claremont.edu


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