2013 AMC 12A Problems/Problem 14
Revision as of 23:49, 6 February 2013 by Indianninja707 (talk | contribs)
Since the sequence is arithmetic,
+
=
, where
is the common difference.
Therefore,
=
-
=
, and
=
(
) =
Now that we found , we just add it to the first term to find
:
+
=
=
=
=
=
, which is