数列教案(公开课)

91.2.3.4.n5.1.2.(1)199220042016(2)8,(),2,-1,-4,(3)-7-11-15()-2322d1nnaad*(2,)nnN,,1.(1)(2)(3)?2.(4)1,3,5,7,9,2,4,6,8,10(5)5,5,5,5,5,5na1addaa12daa12daa23dadaa2123daa34dadaa3134dnaan)1(11addnaan)1(1mmad,dmnaamn)(1(1)85220.(2)-401-5-9-13-8001.37114102.na21a2910ad.3.na93a39ad,121,aa2q1na(0)naqq*(2,)nnNna1adqaa12/qaa12qaa23/2123qaqaaqaa34/3134qaqaa)0,(111qaqaann1aq)0,(111qaqaannmmaq,{na}27/161/3q=-2/3n=1abcq=3ab+8cabc2abcabca+b+c=3a2b2c2abcn11aS21212aSaaS323213aSaaaS121-3211nnnnaSaaaaSnnnnaSaaaaS13211nnnSSadnnnaaaSn212n1n111n1)1(11qqaqqannS1nS{na}n3S=36S=79S=2nS{na}n2S=76S=914S=P1711.123