为等比数列,公比为x,Sn为数列An的前n项和,若Tn=《cn1》S1+《cn2》S2+.+《cnn》Sn,请用n,x.表示Tn.那个《cn1》就是从n个里面取出1个.
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![为等比数列,公比为x,Sn为数列An的前n项和,若Tn=《cn1》S1+《cn2》S2+.+《cnn》Sn,请用n,x.表示Tn.那个《cn1》就是从n个里面取出1个.](/uploads/image/z/15067108-28-8.jpg?t=%E4%B8%BA%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E5%85%AC%E6%AF%94%E4%B8%BAx%2CSn%E4%B8%BA%E6%95%B0%E5%88%97An%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%2C%E8%8B%A5Tn%3D%E3%80%8Acn1%E3%80%8BS1%2B%E3%80%8Acn2%E3%80%8BS2%2B.%2B%E3%80%8Acnn%E3%80%8BSn%2C%E8%AF%B7%E7%94%A8n%2Cx.%E8%A1%A8%E7%A4%BATn.%E9%82%A3%E4%B8%AA%E3%80%8Acn1%E3%80%8B%E5%B0%B1%E6%98%AF%E4%BB%8En%E4%B8%AA%E9%87%8C%E9%9D%A2%E5%8F%96%E5%87%BA1%E4%B8%AA.)
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