(D) . Note that the series converges by the Alternating Series
Test. Since the first term dropped in the estimate is , the estimate is
too high, but within 0.1 of the true sum.
(C) , which equals a constant times the harmonic series.
(D) We seek x such that
Then |x| < e and the radius of convergence is e.
(B) The error is less than the maximum value of for .
This maximum occurs at .
(D)
Note that the curve is traced exactly once by the parametric equations
from t = 0 to t = 1.