设函数<img src='https://img2.soutiyun.com/latex/latex.action' />，则y有( )．
设函数z=ysin(xy)+(1-y)arctanx+e<sup>-2y</sup>，则<img src='https://img2.soutiyun.com/latex/latex.action' />=( )
设f(x)为连续函数，则<img src='https://img2.soutiyun.com/ask/uploadfile/1674001-1677000/64d9e7c239d874f24da744e8ef602e4d.jpg' />等于()．
设z是任一复数,证明<img src='https://img2.soutiyun.com/ask/2021-01-13/9794048514659.png' />
设函数f(x)在x0的某邻域内有定义，且<img src='https://img2.soutiyun.com/ask/2021-01-18/979839323585179.png' />，则（）
设随机变量(X，Y)的密度函数为<img src='https://img2.soutiyun.com/latex/latex.action' />
由<img src='https://img2.soutiyun.com/latex/latex.action' />，确定可微函数z=z(x，y)(f也可微)，则<img src='https://img2.soutiyun.com/latex/latex.action' />=( )
设<img src='https://img2.soutiyun.com/ask/2020-02-12/950353520796115.png' />有二阶连续的导函数，则自然数n的最小值为( )．
二元函数z=f(x，y)的两个偏导数存在，且<img src='https://img2.soutiyun.com/ask/uploadfile/6156001-6159000/4aaf2f9b971c9d04aa6c6a22fc35f35e.jpg' />则( )。
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' />( )
设二维随机变量(X，Y)的分布函数为<img src='https://img2.soutiyun.com/ask/uploadfile/6663001-6666000/45f51949890b44017e315c766cce4df5.png' />，则常数A，B分别为( )．
设函数g(x)=1+x，且当x≠0时，<img src='https://img2.soutiyun.com/ask/2020-02-18/950885721858992.png' />，则<img src='https://img2.soutiyun.com/ask/2020-02-18/950885746436467.png' />等于( )
设随机变量X的分布函数<img src='https://img2.soutiyun.com/latex/latex.action' />，则E(X)=( )
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
设复数z满足<img src='https://img2.soutiyun.com/shangxueba/ask/1644001-1647000/1646297/ct_kgctem_kgctechoose_0132(106)1.jpg' />，则|1+z|=()．
设函数<img src='https://img2.soutiyun.com/ask/uploadfile/6663001-6666000/7fee95fbf99d9f714abb3e1ddd775b06.png' />则( )成立．
设函数<img src='https://img2.soutiyun.com/ask/2019-12-21/945780553197574.png' />，则( )成立。
设参数方程<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17672290/2015102617310076340.jpg' />，确定了y是x的函数，f″（t）存在且不为零，则d<sup>2</sup>y／d<sup>2</sup>x的值是：（）
设f(x)为连续函数,且满足等式<img src='https://img2.soutiyun.com/shangxueba/ask/51381001-51384000/51383367/97672305236883.png' />则<img src='https://img2.soutiyun.com/shangxueba/ask/51381001-51384000/51383367/976723063701479.png' />=().
求下列系统函数在10＜|z|≤∞及0.5＜|z|＜10两种收敛情况下系统的单位样值响应，并说明系统的稳定性与因果性。<img src='https://img2.soutiyun.com/latex/latex.action' />
设函数<img src='https://img2.soutiyun.com/shangxueba/ask/51060001-51063000/51061013/970054070213009.png' />求方程f(x)=0的根。
设函数f（x<sub>0</sub>）在x处可导，则<img src='https://img2.soutiyun.com/shangxueba/ask/18819001-18822000/18819878/2016030417262288150.jpg' />（），
设函数f(x)一阶连续可导.且f(0)=f&39;(0)=1,则<img src="https://img2.soutiyun.com/ask/2020-12-11/976544786128219.png"/>=().
