幂级数x+2x2+3x3+…在区间(-1,1)上收敛。
幂级数在区间(2,3)上收敛。()<img src="http://p.ananas.chaoxing.com/star3/origin/db9bd75eb63772d017847c0c93df5b9c.png"/>
幂级数<img src='https://img2.soutiyun.com/latex/latex.action' />的收敛域为( ).
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<img src='https://img2.soutiyun.com/ask/2020-03-11/952811239855432.png' />,则x=1是f(x)在区间[-2,2]上的( ).
幂级数的收敛区间是(). (A)(-1,1) (B)(0,2) (C)[-1,1) (D)[0,2)
下图为基础沉降缝的()处理方案。<img src='https://img2.soutiyun.com/1/2021-03-19/985009073841188.png' />
设<img src='https://img2.soutiyun.com/ask/2020-12-15/976910006079741.png' />为同一区间上的可导函数,证明
级数<img src='https://img2.soutiyun.com/latex/latex.action' />收敛,则必有( ).
图示结构的超静定次数为()。<img src='https://img2.soutiyun.com/1/2021-03-11/984326378977064.jpg' />
计<img src='https://img2.soutiyun.com/latex/latex.action' />,则这两个积分和数1的大小比较为( ).
幂级数<img src='https://img2.soutiyun.com/latex/latex.action' />的收敛半径R=( ).
点M<sub>1</sub>(3,-1,2)到直线L:<img src='https://img2.soutiyun.com/shangxueba/ask/18723001-18726000/18723265/2016071514244173938.jpg' />的距离为()<img src='https://img2.soutiyun.com/shangxueba/ask/18723001-18726000/18723265/201607151425353100.jpg' />
关于某企业六级和五级薪酬区间的下述相关数据的说法中,正确的是()。<img src='https://img2.soutiyun.com/1/2020-12-22/977479420377688.png' />:
某灯管厂生产10万只日光灯管,现采用简单随机不重复抽样方法抽取1‰的灯管进行质量检验,检测结果如下:<img src="https://img2.soutiyun.com/shangxueba/askkp/2022-04/14/246/20220414100227782.png" alt=""/>根据上表资料:(1)样本总体灯管的平均耐用时间;(2)在99.73%的概率保证下,估计10万只灯管平均耐用时间的区间范围;(3)按质量规定,凡耐用时间不及800小时的灯管为不合格品,试计算样本总体灯管的合格率,并按95%的概率保证程度,估计10万只灯管的合格率的区间范围。
路图中的时间常数为()。<img src='https://img2.soutiyun.com/1/2021-01-13/979396966832925.png' />
下图中鞋子图片拍摄采用的主光源为()<img src='https://img2.soutiyun.com//1/2021-05-27/990984507190468.png' />
点(1,2,1)到平面<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115113928560.png' />+2<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115114815657.png' />+2<img src='https://img2.soutiyun.com/shangxueba/ask/19032001-19035000/19032905/2015110115115812967.png' />-10=0的距离为()。
一离散序列x(n),若其Z变换X(z)存在,而且X(z)的收敛域为:<img src='https://img2.soutiyun.com/shangxueba/ask/18120001-18123000/18120940/2016031711544777476.jpg' />,则x(n)为()。
如图15-2-35所示,梁A端弯矩为()。<img src='https://img2.soutiyun.com/1/2021-04-08/986750110091987.png' />
<img src='https://img2.soutiyun.com/shangxueba/ask/2022-04/26/271/20220426114349523.png' />=(),其中<img src='https://img2.soutiyun.com/shangxueba/ask/2022-04/26/423/20220426114358134.png' />为定向闭折线ABCA,这里的A,B,C依次为(1,0,0),(0,1,0)和(0,0,1)。
一离散序列x(n),其定义域为-5n<<img src='https://img2.soutiyun.com/shangxueba/ask/18108001-18111000/18109006/2016031711571350484.jpg' />,若其Z变换存在,则其Z变换X(z)的收敛域为()。<img src='https://img2.soutiyun.com/shangxueba/ask/18108001-18111000/18109006/2016031711572938708.jpg' />
下图为几种典型空气状态变化过程,其中对A-1过程描述正确的是()<img src='https://img2.soutiyun.com/1/2021-03-01/983459200160235.png' />
图中t³0时iL(t)为()。<img src='https://img2.soutiyun.com/1/2021-01-13/979397149548376.png' />