Key
to Practice AP Exam, Part I,
[posted
AACBA XDBEC ABDAA CBBCD BCDEA
Note regarding #6 (please read: lots
of good information here)
There is no correct answer to #6. Choice B is the least incorrect, in the sense
that it can be made correct with the smallest number of typographical
corrections. By replacing f (x) with |f (x)| in statement II,
we would have a series that is absolutely convergent (by comparison with a
convergent p-series where p = 2). This is probably what the
misguided question writer intended. By the first paragraph between the green
boxes on p.635 of your textbook, we know that absolute convergence implies
convergence. Therefore, the modified version of statement II will guarantee
convergence of the original series.