摘要:等差数列是其前n项和.则S2008的值为A.-2006 B.2006 C.-2008 D.2008
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等差数列{an}中,Sn是其前n项和,a1=-2008时,
-
=2,则S2008的值为( )
S2007 |
2007 |
S2005 |
2005 |
A、-2006 | B、2006 |
C、-2008 | D、2008 |