无穷数列
- 网络infinite sequence
无穷数列-
证明了如下定理：存在一个正偶整数的无穷算术数列，其中每一项都与3互素且不能表为p+3k形式。
In this paper , it is proved that there is an infinite arithmetic progression of positive even numbers each of which is prime to 3 , and has no representation of the form p + 3 ~ k .
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文章运用两种巧妙的分割和利用无穷递缩等比数列求和公式等初等数学知识，求出了抛物线与相交直线围成的弓形面积计算公式。
In this paper , we show a formula for the arciform area enclosed with a parabola and a straight line by means of two kinds of clever separation and the knowledges of elements mathematics such as the sum formula of infinite decreasing geometric sequence .