阶段一,阶段二,阶段三,学业分层测评,1/38,2/38,等比,3/38,等比,q,4/38,5/38,6/38,7/38,8/38,9/38,等比数列前,n,项和性质应用,10/38,11/38,12/38,13/38,14/38,15/38,XXX,分组求和法,16/38,17/38,18/38,19/38,20/38,等差、等比数列性质应用对比,21/38,22/38,23/38,24/38,25/38,26/38,27/38,28/38,29/38,30/38,31/38,32/38,33/38,34/38,35/38,36/38,37/38,38/38,