已知数列{an}满足a1=31,an=an-1-2(n大于等于2,n属于自然数)设bn=|an|,求数列{an}的前n项和T
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![已知数列{an}满足a1=31,an=an-1-2(n大于等于2,n属于自然数)设bn=|an|,求数列{an}的前n项和T](/uploads/image/z/2712103-7-3.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ban%7D%E6%BB%A1%E8%B6%B3a1%3D31%2Can%3Dan-1-2%EF%BC%88n%E5%A4%A7%E4%BA%8E%E7%AD%89%E4%BA%8E2%2Cn%E5%B1%9E%E4%BA%8E%E8%87%AA%E7%84%B6%E6%95%B0%EF%BC%89%E8%AE%BEbn%3D%7Can%7C%2C%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CT)
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已知数列{an}满足a1=31,an=an-1-2(n大于等于2,n属于自然数)设bn=|an|,求数列{an}的前n项和T
已知数列{an}满足a1=31,an=an-1-2(n大于等于2,n属于自然数)
设bn=|an|,求数列{an}的前n项和T
已知数列{an}满足a1=31,an=an-1-2(n大于等于2,n属于自然数)设bn=|an|,求数列{an}的前n项和T
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