摘要
A pithy formula Sn=kqn-k is introduced through the changing summation formula of geometrical series . Therefore explore further,a beautiful necessary and sufficient proposition on geometrical series have got.This proposition is fast to solving the problems on summation of the geometrical series .In addition ,it is explored that the summation formula Σk i =1 x1qni+m is the summation formula of geometrical series.
A pithy formula Sn = kq^n - k is introduced through the changing summation formula of geometrical series. Therefore explore further, a beautiful necessary and sufficient proposition on geometrical series have got. This proposition is fast to solving the problems on summation of the geometrical series. In addition, it is explored that the summation formula ^k∑i=1 x1 q^ni ＋ m is the summation formula of geometrical series.
出处
《铜仁师范高等专科学校学报》
2005年第1期68-70,88,共4页
Journal of Tongren Teachers College
关键词
等比数列
充要条件
应用
geometrical series
necessary and sufficient condition
application
