等差数列是指从第二项起，每一项与它的前一项的差等于同一个常数的一种数列，常用A、P表示。这个常数叫做等差数列的公差，公差常用字母d表示。 例如：1,3,5,7,9……2n-1。通项公式为：an=a1+(n-1)*d。首项a1=1，公差d=2。前n项和公式为：Sn=a1*n+[n*(n-1)*d]/2或Sn=[n*(a1+an)]/2。注意：以上n均属于正整数。
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等差数列的公差 common difference
等值等差数列 Arithmetic progression
在连续的素数等差数列 CPAP
等差数列的等差累进和 Research of Mathematic Teaching-Learning
高阶等差数列 arithmetic progression of higher order
我们首先介绍了高阶等差数列前 n 项和的求解方法。
We first introduce methods of finding the sum of the first n terms for an arithmetic sequence of higher order.
结果表明， 等差数列的利用可规范第一种误读。
The result shows that the utility of the arithmetic progression can limit the first kind of misread.
考察了由3个素数和1个殆素数构成的等差数列。
Arithmetic progressions, any one in which consists of 3 primes and 1 almost prime, are investigated.
应用推荐