已知数列{an}的前n项和为Sn,且Sn=2an-2(n∈N*),在数列{bn}中,b1=1,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)记Tn=a1b1+a2b2+…+anbn,求Tn. |
与“已知数列{an}的前n项和为Sn,且Sn=2an-2(n∈N*),在数列{bn}中,b1=1,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)记Tn=a1b1+a2b2+…+anbn,求Tn.”考查相似的试题有: