設(shè)曲線f(x)=xn+1(n∈N*)在點(diǎn)(1,1)處的切線l與x軸的交點(diǎn)的橫坐標(biāo)為xn,令an=lgxn.
(1)若數(shù)列{an}的前n項(xiàng)和為Sn,求S99;
(2)若切線l與y軸的交點(diǎn)的縱坐標(biāo)為yn,bn=-yn,cn=bn?2bn,求數(shù)列{cn}的前n項(xiàng)和Tn.
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【考點(diǎn)】錯位相減法.
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發(fā)布:2024/4/20 14:35:0組卷:13引用:1難度:0.6
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