Three methods-structural volume,binomial formula and definite integral-can be employed to derive the formula for the snm of the K power of positive N term integer.
用构造体积、应用二项式定理、利用定积分的三种方法,导出正整数前n项k方和公式,并对此进行推算。
This paper briefly discusses the definition, genesis end classification, proposes the concept of waterflooding oil water interface, indicates that the raising of this interface to the top of the reservoir makes the oil well watered out and stop production in the reservoir, and confirms the mechanism that microstructures influence oil well production.
对微型构造的定义、成因、分类作了简要论述。