已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵...已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵消不完)
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![已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵...已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵消不完)](/uploads/image/z/1808894-38-4.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ban%7D.a1%3D2.a%2Fan%3D2n%2B2%2Fn.%E6%B1%82%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F.%E6%B3%A8%EF%BC%88%2F%E6%98%AF%E5%88%86%E6%95%B0%E7%BA%BF%2Ca%E6%98%AF%E7%AC%ACn%E9%A1%B9.%EF%BC%88%E7%B4%AF%E4%B9%98%E6%B3%95%E6%88%91%E5%81%9A%E4%B8%80%E5%8D%8A%E5%B0%B1%E6%8A%B5...%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ban%7D.a1%3D2.a%2Fan%3D2n%2B2%2Fn.%E6%B1%82%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F.%E6%B3%A8%EF%BC%88%2F%E6%98%AF%E5%88%86%E6%95%B0%E7%BA%BF%2Ca%E6%98%AF%E7%AC%ACn%E9%A1%B9.%EF%BC%88%E7%B4%AF%E4%B9%98%E6%B3%95%E6%88%91%E5%81%9A%E4%B8%80%E5%8D%8A%E5%B0%B1%E6%8A%B5%E6%B6%88%E4%B8%8D%E5%AE%8C%EF%BC%89)
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已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵...已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵消不完)
已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵...
已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵消不完)
已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵...已知数列{an}.a1=2.a/an=2n+2/n.求通项公式.注(/是分数线,a是第n项.(累乘法我做一半就抵消不完)
左积=a2 /a1×a3/a2×a4/a3×……×a(n-1)/a(n-2) ×an/a(n-1)
=an/a1=?an
右积=2×2/1×2×3/2×……×2×(n-1)/(n-2)×2×n/(n-1)=[2∧(n-1) ] ×n
an=n×2∧n
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