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设正项等比数列{an},a4=81,且a2,a3的等差中项为. (1)求数列{an}的通项公式; (2)若bn=log3a2n﹣1,数列{bn}的前n项和为Sn,数列{cn}满足,Tn为数列{c...
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高三下学期数学《2018年河南省豫南九校高考数学一模试卷(文科)》真题及答案
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