高中数学数列 求解 急啊!已知数列{An}的前n项和Sn=2^n,数列{Bn}满足B1=-1,Bn+1=Bn+(2n+1) (n=1,2,3,4……)(1)求数列{An}的通项An;(2)求数列{Bn}的通项Bn;(3)若Cn=An*Bn/n,求数列{Cn}的前n项和Tn
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![高中数学数列 求解 急啊!已知数列{An}的前n项和Sn=2^n,数列{Bn}满足B1=-1,Bn+1=Bn+(2n+1) (n=1,2,3,4……)(1)求数列{An}的通项An;(2)求数列{Bn}的通项Bn;(3)若Cn=An*Bn/n,求数列{Cn}的前n项和Tn](/uploads/image/z/3965503-31-3.jpg?t=%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E6%95%B0%E5%88%97+%E6%B1%82%E8%A7%A3+%E6%80%A5%E5%95%8A%21%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7BAn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CSn%3D2%5En%2C%E6%95%B0%E5%88%97%7BBn%7D%E6%BB%A1%E8%B6%B3B1%3D-1%2CBn%2B1%3DBn%2B%EF%BC%882n%2B1%EF%BC%89+%EF%BC%88n%3D1%2C2%2C3%2C4%E2%80%A6%E2%80%A6%EF%BC%89%EF%BC%881%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%7BAn%7D%E7%9A%84%E9%80%9A%E9%A1%B9An%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82%E6%95%B0%E5%88%97%7BBn%7D%E7%9A%84%E9%80%9A%E9%A1%B9Bn%EF%BC%9B%EF%BC%883%EF%BC%89%E8%8B%A5Cn%3DAn%2ABn%2Fn%2C%E6%B1%82%E6%95%B0%E5%88%97%7BCn%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CTn)
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