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数列的前n项和为Sn,an=,则Sn≥0的最小正整数n的值为A.12B.13C.14D.1...
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数列的前n项和为S
n,a
n=
,则S
n≥0的最小正整数n的值为( )
A.12
B.13
C.14
D.15
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