幂级数<img src='https://img2.soutiyun.com/latex/latex.action' />的收敛半径R=( ).
相似题目
-
设a为常数,则级数<img src='https://img2.soutiyun.com/latex/latex.action' />( ).
-
已知两个线性变换<img src='https://img2.soutiyun.com/ask/2020-07-24/964447450539867.png' />,求从<img src='https://img2.soutiyun.com/ask/2020-07-24/964447482729708.png' />到<img src='https://img2.soutiyun.com/ask/2020-07-24/964447490132131.png' />的线性变换。
-
幂级数<img src='https://img2.soutiyun.com/latex/latex.action' />的收敛域为( ).
-
级数<img src='https://img2.soutiyun.com/latex/latex.action' />与∑<img src='https://img2.soutiyun.com/latex/latex.action' />满足u<sub>n</sub>≤v<sub>n</sub>(n=1,2,…),则( ).
-
若<img src='https://img2.soutiyun.com/latex/latex.action' />,<img src='https://img2.soutiyun.com/latex/latex.action' />,则下列式子成立的是( )
-
设a为常数,则级数<img src='https://img2.soutiyun.com/ask/uploadfile/6681001-6684000/7528d38b5c08d705855c25ce86a7ee6d.png' />( )
-
若级数<img src='https://img2.soutiyun.com/latex/latex.action' />与<img src='https://img2.soutiyun.com/latex/latex.action' />分别收敛于S<sub>1</sub>与S<sub>2</sub>,则( )式未必成立.
-
设f(x)以2π为周期,<img src='https://img2.soutiyun.com/ask/uploadfile/6681001-6684000/04820dd60870b1dd31e972d33b85c0e5.png' />,s(x)为f(x)的傅里叶级数、和函数,则( )
-
已知z=lnu,<img src='https://img2.soutiyun.com/latex/latex.action' />,则<img src='https://img2.soutiyun.com/latex/latex.action' />( )
-
级数<img src='https://img2.soutiyun.com/latex/latex.action' />收敛,则必有( ).
-
设<img src='https://img2.soutiyun.com/latex/latex.action' />则<img src='https://img2.soutiyun.com/latex/latex.action' />=( ).
-
当( )时,无穷级数<img src='https://img2.soutiyun.com/latex/latex.action' />(u>0)绝对收敛.
-
男性,40岁,发现左侧颈部小包块,CT、MRI检查如图所示,请选择最可能的诊断()<img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818164956119.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818165646074.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/2016072818170225050.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18300001-18303000/18301269/20160728181708767.jpg' />
-
利用幂级数展开,计算<img src='https://img2.soutiyun.com/shangxueba/ask/51432001-51435000/51432829/980695520313543.png' />。
-
幂级数<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671982/2015102915280779420.jpg' />
-
病历摘要:脑膜瘤患者女,55岁,视力下降数月。查体:视力下降,余神经体征阴性。<img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411361155670.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411363213140.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411363770796.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411364194722.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411364682394.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/21054001-21057000/21056152/2016080411365145350.jpg' />
-
将函数f(x)=x<sup>2</sup>在<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617062459326.jpg' />上展开成余弦级数,其形式为<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617063532608.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617065141640.jpg' />()<img src='https://img2.soutiyun.com/shangxueba/ask/18735001-18738000/18737342/2016071617071375522.jpg' />
-
某一水泵的流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/20150618111622761.jpg' />,漏损流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811163167874.jpg' />,叶轮内的流量为<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811163945969.jpg' />,则其容积效率<img src='https://img2.soutiyun.com/shangxueba/ask/18726001-18729000/18727196/2015061811164812800.jpg' />为()。
-
利用上颌双侧<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />垫矫正反<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />,反<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />解除后<img src='https://img2.soutiyun.com/shangxueba/ask/17559001-17562000/17561302/2015093009262249313.jpg' />垫每次应磨去多少()
-
一台4极中型异步电动机,P<sub>N</sub>=200kW,U<sub>N</sub>=380V,定子0联接,定子额定电流I<sub>N</sub>=385A,频率50Hz,定子铜耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560273352189.png' />=5.12kW.转子铜耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560286697952.png' />=2.85kW,铁耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560298531629.png' />=3.8kW,机械损耗<img src='https://img2.soutiyun.com/ask/2021-01-03/97856031340548.png' />=0.98kW,附加损耗<img src='https://img2.soutiyun.com/ask/2021-01-03/978560322980028.png' />=3kW,<img src='https://img2.soutiyun.com/ask/2021-01-03/978560339469971.png' />.正常运行时<img src='https://img2.soutiyun.com/ask/2021-01-03/978560353474772.png' />,起动时<img src='https://img2.soutiyun.com/ask/2021-01-03/978560375203015.png' />,由于磁路饱和与趋肤效应的影响,<img src='https://img2.soutiyun.com/ask/2021-01-03/978560441999835.png' /><img src='https://img2.soutiyun.com/ask/2021-01-03/97856039470213.png' />.试求:
-
设<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264374908477.png' />是n维实向量,且<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264387229182.png' />战性无关,<img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264401121976.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/51291001-51294000/51293683/975264415373792.png' />是线性方程组
-
(2013)正项级数<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19033100/2015110315490562976.png' />的部分和数列<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19033100/2015110315495812105.png' />有上界是该级数收敛的:()
-
若<img src='https://img2.soutiyun.com/latex/latex.action' />,<img src='https://img2.soutiyun.com/latex/latex.action' />试证明时域卷积定理<img src='https://img2.soutiyun.com/latex/latex.action' />和频域卷积定理<img src='https://img2.soutiyun.com/latex/latex.action' />
-
男,4个月,相貌怪异,结合图像,最可能的诊断()<img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/201511231032013640.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/2015112310320224881.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/201511231032042853.jpg' /><img src='https://img2.soutiyun.com/shangxueba/ask/17796001-17799000/17798971/2015112310320644602.jpg' />
推荐题目
- “完整儿童”是幼儿教育应着眼于幼儿生理素质、心理素质、社会文化素质的完整培养,达成幼儿德、智、体、美、劳的全面和谐发展。
- 当代西方政治系中,对政治统治进行分类研究的是()
- 观察主动脉右冠瓣及无冠瓣结构时,常用检查切面中正确的是()。
- 空调歧管压力计的低压侧的压力表既可用于显示压力,也可用于显示真空度,真空度读数范围为()MPa。
- newspaper的中文意思是()。
- 软骨膜
- 如今政府办公越来越公开透明,不仅有晒支出、晒收入的,还有中央政府采购网、地方政府采购网等专门化网站,为公民的监督提供了更好的途径。政府的公开透明化说明( )。
- 感觉和知觉合称为感知,是信息输入的心理过程。产生感知过程失误的原因主要有:()。
- 世界三大音乐教育体系的创始人分别为哪三位?
- 患者男,69岁。5天前出现夜不眠,表情淡漠呆滞,行为紊乱,在房间中不停摸索乱翻东西,问其找什么,回答则言语凌乱不知所云。白天卧床行为安静,少语少动,对夜间发生的事不能回忆,生活不能自理,拒食水,偶有小便失禁。体格检查:左侧下肢肌力4级,膝反射亢进,左侧巴宾斯基征阳性。目前考虑患者处于什么状态