什麽是Arithmetic and Geometric Sequences

题目

什麽是Arithmetic and Geometric Sequences
请解释一下两者的分别...
可以的话请例举一些例子,

答案

（1）We will call a sequence an arithmetic sequence if there is a common difference
意思是我们称一个有相等差别的数列为算术数列,其实说白了就是我们的等差数列
如1,3,5,7,9.
（2）A Geometric Sequence is a sequence which the ratio of the common terms is equal.
The general term is
an = a1 * r^（n-1）
意思是:"几何数列就是数字间是同等比例的顺序"
说白了就是我们常说的等比数列
如：3,6,12,24,48...
就是3*2^（n-1）
参考资料里非常详细,不过是英文版的,有不明白的请来信息