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本文主要是在年金分布的基础上,推广、定义并研究了一类r尾年金分布的存在性和结构,给出了这类分布的存在性条件,证明了在一定条件下,r尾年金分布是年金分布与某一特殊r尾年金分布的混合．
Based on the annuity distribution, this paper generalizes the existence and structure of a r-shaped annual annuity distribution on the basis of the annuity distribution, and presents the existence conditions of such distributions. It is proved that under certain conditions, the distribution of r tail annuities Is a mixture of annuity distribution and a particular r annuus gold distribution.