社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围A.t>=1 B.tt
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![社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围A.t>=1 B.tt](/uploads/image/z/5429932-52-2.jpg?t=%E7%A4%BE%E6%97%A0%E7%A9%B7%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97an%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E8%8B%A5%E4%B8%8D%E7%AD%89%E5%BC%8Fan%5E2%2BSn%5E2%2Fn%5E2%3E%3Dt%2F5a1%5E2%E8%AE%BE%E6%97%A0%E7%A9%B7%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E8%8B%A5%E4%B8%8D%E7%AD%89%E5%BC%8Fan%5E2%2BSn%5E2%2Fn%5E2%3E%3D%28t%2F5%29a1%5E2%E5%AF%B9%E4%BB%BB%E6%84%8F%E6%AD%A3%E6%95%B4%E6%95%B0n%E9%83%BD%E6%88%90%E7%AB%8B%2C%E5%88%99%E5%AE%9E%E6%95%B0t%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4A.t%3E%3D1+B.tt)
社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围A.t>=1 B.tt
社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2
设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围
A.t>=1 B.t
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社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围A.t>=1 B.tt
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A选项,是不是A t
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社无穷等差数列an的前n项和为Sn,若不等式an^2+Sn^2/n^2>=t/5a1^2设无穷等差数列{an}的前n项和为Sn,若不等式an^2+Sn^2/n^2>=(t/5)a1^2对任意正整数n都成立,则实数t的取值范围A.t>=1 B.tt
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