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已知等差数列{an}满足a1+a2+a3+…+a101=0,则有
a1+a101>0;
a2+a100<0;
a3+a99=0;
a51=51.
已知等差数列
a1+a101>0
a1+a101<0
a1+a101=0
a51=51
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a2+a100<0
a3+a99=0