求解几条数列求和A.Qn=1/n (n>=2)B.Qn=1/n(n-1) (n>=2)C.Qn=1/n^2 (n>=2)D.Qn=1/n(n+1) (n>=2)先问一下各自怎么求和,为什么A不能成为概率分布?有的书说A是发散的,极限不是0吗?怎么会是发散的?还是不太懂Qn=1/n (
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![求解几条数列求和A.Qn=1/n (n>=2)B.Qn=1/n(n-1) (n>=2)C.Qn=1/n^2 (n>=2)D.Qn=1/n(n+1) (n>=2)先问一下各自怎么求和,为什么A不能成为概率分布?有的书说A是发散的,极限不是0吗?怎么会是发散的?还是不太懂Qn=1/n (](/uploads/image/z/14742352-64-2.jpg?t=%E6%B1%82%E8%A7%A3%E5%87%A0%E6%9D%A1%E6%95%B0%E5%88%97%E6%B1%82%E5%92%8CA.Qn%3D1%2Fn+%28n%3E%3D2%29B.Qn%3D1%2Fn%28n-1%29+%28n%3E%3D2%29C.Qn%3D1%2Fn%5E2+%28n%3E%3D2%29D.Qn%3D1%2Fn%28n%2B1%29+%28n%3E%3D2%29%E5%85%88%E9%97%AE%E4%B8%80%E4%B8%8B%E5%90%84%E8%87%AA%E6%80%8E%E4%B9%88%E6%B1%82%E5%92%8C%2C%E4%B8%BA%E4%BB%80%E4%B9%88A%E4%B8%8D%E8%83%BD%E6%88%90%E4%B8%BA%E6%A6%82%E7%8E%87%E5%88%86%E5%B8%83%3F%E6%9C%89%E7%9A%84%E4%B9%A6%E8%AF%B4A%E6%98%AF%E5%8F%91%E6%95%A3%E7%9A%84%2C%E6%9E%81%E9%99%90%E4%B8%8D%E6%98%AF0%E5%90%97%3F%E6%80%8E%E4%B9%88%E4%BC%9A%E6%98%AF%E5%8F%91%E6%95%A3%E7%9A%84%3F%E8%BF%98%E6%98%AF%E4%B8%8D%E5%A4%AA%E6%87%82Qn%3D1%2Fn+%28)
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