阶段一,阶段二,阶段三,学业分层测评,1/39,2/39,第,1,项,(,或前几项,),递推,3/39,数列,n,4/39,5/39,6/39,7/39,8/39,9/39,由递推关系写数列项,10/39,11/39,12/39,13/39,14/39,XXX,数列最大,(,小,),项求法,15/39,16/39,17/39,18/39,19/39,20/39,21/39,22/39,数列递推公式与通项公式关系,23/39,24/39,25/39,26/39,27/39,28/39,29/39,30/39,31/39,32/39,33/39,34/39,35/39,36/39,37/39,38/39,39/39,