试题:
数列{an}的前n项和为Sn,且满足Sn=2(an-1),数列{bn}中,b1=1,且点P(bn,bn+1)在直线x-y+2=0上, (1)求数列{an}、{bn}的通项公式; (2)设Hn=
(3)设Tn=
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答案:
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