x
f(x) = e
We can compute the value of this function for any x using a Taylor series expansion:
1 2 3 n
x x x x x
e = 1 + ---- + ---- + ---- + ... + ---- + ...
1! 2! 3! n!
This is an inifinite series; we can get the exact
value of the result if we compute and add an infinite number of terms.