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数列{an}的通项公式an=,则该数列的前项之和等于9.A.98B.99C.96D.97
试题详情
数列{a
n}的通项公式a
n=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAD0AAAAkCAYAAAA6uzK6AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,则该数列的前( )项之和等于9.
A.98
B.99
C.96
D.97
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