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等比数列{an}的各项为正数，且( ) A.12 B.10 C.8 D.2+log35

作者: tihaiku 人气: - 评论: 0
问题
选项 等比数列{an}的各项为正数，且( ) A.12 B.10 C.8 D.2+log35
答案 B
解析 由等比数列等比中项的性质可知，a5a6=a4a7=9，而log3a1+log3a2+…+log3a10=log3a1a2…a10=log3(a1a10)3=5log3a1a10=5X2=10。

相关内容：正数,D.2+log35

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