已知f(x)=根号下4+1/x2,数列{an}的前n项和为Sn,点Pn(an,-1/an+1)(n属于N*)在曲线y=f(x)上,且a1=1,an>0.已知f(x)=根号下4+1/x2,数列{an}的前n项和为Sn,点Pn(an,1/an+1)(n属于N*)在曲线y=f(x)上,且a1=1,an>0.(1)求数列{an}的
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![已知f(x)=根号下4+1/x2,数列{an}的前n项和为Sn,点Pn(an,-1/an+1)(n属于N*)在曲线y=f(x)上,且a1=1,an>0.已知f(x)=根号下4+1/x2,数列{an}的前n项和为Sn,点Pn(an,1/an+1)(n属于N*)在曲线y=f(x)上,且a1=1,an>0.(1)求数列{an}的](/uploads/image/z/3929205-21-5.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B4%2B1%2Fx2%2C%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E7%82%B9Pn%28an%2C-1%2Fan%2B1%29%28n%E5%B1%9E%E4%BA%8EN%2A%29%E5%9C%A8%E6%9B%B2%E7%BA%BFy%3Df%28x%29%E4%B8%8A%2C%E4%B8%94a1%3D1%2Can%3E0.%E5%B7%B2%E7%9F%A5f%28x%29%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B4%2B1%2Fx2%2C%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BASn%2C%E7%82%B9Pn%28an%2C1%2Fan%2B1%29%28n%E5%B1%9E%E4%BA%8EN%2A%29%E5%9C%A8%E6%9B%B2%E7%BA%BFy%3Df%28x%29%E4%B8%8A%2C%E4%B8%94a1%3D1%2Can%3E0.%281%29%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84)
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