题干

设N+表示正数数集,在数列{an}中,∀n∈N+,an+1是an+1与3an的等差中项,如果a1=3,那么数列{an}的通项公式为____ .

上一题 下一题 0.0难度 选择题 更新时间:2019-01-24 07:31:31

答案(点此获取答案解析)

an=3n

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