Definition The infinite series converges and has sum if the sequence of partial sums converges to ,that is .If diverges, then the series diverges. A divergent series has no sum.

 
  • 定义如果级数的部分和数列有极限,即,则称无穷级数收敛,这时极限叫做这级数的和,并写成;如果没有极限,则称无穷级数发散。
今日热词
目录 附录 查词历史