首页/ 题库 / [单选题]级数∞∑n-1 un的部分和数列{sn}的答案

级数∞∑n-1 un的部分和数列{sn}的极限lim n→∞ sn存在是级数收敛的()

单选题
2021-09-01 22:57
A、充分条件
B、必要条件
C、充分必要条件
D、无关条件
查看答案

正确答案
C

试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

若级数∞∑n-1 |un|收敛,则级数∞∑n-1 un必定(),若级数∞∑n-1 un条件收敛,则级数∞∑n-1|un|必定()
若级数∑n=1(un+vn)收敛,则级数∑n=1un和∑n=1vn都收敛. ( )
级数∞∑n-1 un的部分和数列{sn}的极限lim n→∞ sn存在是级数收敛的()
设∞n=1Σan是正项级数,前n项和为Sn= n k=1Σak,则数列﹛sn﹜有界是∞ n k=1Σak,则数列﹛sn﹜有界是 ∞n=1Σan 收敛的()
1im n→∞ un=0是级数∑∞ un n=1收敛的()条件
判断∑^n-1^1/n和级数∑^n-1^4/n的敛散性.
若级数n=1和n=1都发散,则级数n=1也发散 ( )
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
数列{an}的前n项和为Sn,若an=1/n(n+1),则S5等于()。
癸卯学制将高等教育机构明确分为大学堂、高等学堂和()。
广告位招租WX:84302438

免费的网站请分享给朋友吧