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[2013·福建高考]阅读如图所示的程序框图,若输入的k=10,则该算法的功能是(  )
A.
计算数列{2 n -1 }的前10
B.
计算数列{2 n -1 }的前9
C.
计算数列{2 n -1}的前10
D.
计算数列{2 n -1}的前9
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