等差数列前n项和为Sn,a1=-11,a4+a6=-6,则当Sn取最小值时,n=,
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等差数列前n项和为Sn,a1=-11,a4+a6=-6,则当Sn取最小值时,n=,
设等差数列{an}的前n项和为sn,若a1=-11,a4+a6=-6,则当sn取最小值时,n等于?
设等差数列{An}的前n项和为Sn,若a1=-11,a4+a6=-6,曾当sn取最小值时,n等于
设等差数列{an}的前n项和为Sn,若a1=-11,a4+a6=-6,则当Sn取最小值时,n等于?
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设等差数列an的前n项和为Sn,若a1=-11,a4a6=-6,则当Sn取最小值时,n等于