若数列{an}满足a1=2且an+an-1=2n+2n-1,Sn为数列{an}前n项和,则log2(S2012+2)=_.

问题描述:

若数列{an}满足a1=2且an+an-1=2n+2n-1,Sn为数列{an}前n项和,则log2(S2012+2)=______.

∵an+an-1=2n+2n-1,Sn为数列{an}前n项和,∴S2012=(a1+a2)+(a3+a4)+…+(a2011+a2012)=(21+22)+(23+2⁴)+…+(22011+22012)=2+22+23+…+22012=2(1−22012)1−2=22013-2,∴S2012+2=22013,∴log2(S2012+...