11班-错题重做-答案和解析公开课

1.4 CDAA5・86.9407-(1) a〔j+l〕〔2TL-外:anda〔j〕〔2TH=^・(2)㊀一①n(a)—l®aE〔3Ta〔i — l = 3〕Qr+nt + lBt + Hl.a)ZI