已知數(shù)列{an}的首項(xiàng)a1=1且滿足4anan+1=an-3an+1(n∈N*).
(1)證明:{1an+2}是等比數(shù)列;
(2)數(shù)列{bn}滿足b1=13,bn+1=2n+12n+3bn,記cn=2an+1anbn,求數(shù)列{cn}的前n項(xiàng)和Tn.
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【考點(diǎn)】錯(cuò)位相減法.
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【解答】
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發(fā)布:2024/9/13 3:0:11組卷:248引用:6難度:0.5
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