已知等差数列{an}中,3(a3+a5)+2(a2+a7+a9)=24,则该数列的前10项的和是
人气:474 ℃ 时间:2020-04-03 13:33:19
解答
20根据已知可以算出a5=2每一项为2时也满足条件~~嘻嘻 就知道了
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