Sat Mar 9 18:23:54 EST 2013

Exponentials: exp(x) vs exp(x/2)^2

For approximations of exp(x) as truncated Taylor series, this might be
an interesting problem.

The main question is: halving followed by squaring is two
multiplications, which is about the same complexity as adding a term
to the series (multiply + add).  What is the difference in precision?