设<img src='https://img2.soutiyun.com/latex/latex.action' />的定义域为(-∞，+∞)，则k的取值范围是( )。

设函数<img src='https://img2.soutiyun.com/latex/latex.action' />，则y有( )．

设<img src='https://img2.soutiyun.com/latex/latex.action' />则f(-x)=( )

设a为常数，则级数<img src='https://img2.soutiyun.com/latex/latex.action' />( )．

设<img src='https://img2.soutiyun.com/ask/2019-07-21/932567761612919.png' />，当K增大时，闭环系统( )。

设<img src='https://img2.soutiyun.com/ask/2019-06-30/93073871106346.png' />，当K增大时，闭环系统( )。

设z是任一复数,证明<img src='https://img2.soutiyun.com/ask/2021-01-13/9794048514659.png' />

求下列等式：设<img src='https://img2.soutiyun.com/ask/2020-11-11/973957900743664.png' />

设随机变量(X，Y)的密度函数为<img src='https://img2.soutiyun.com/latex/latex.action' />

设曲线<img src='https://img2.soutiyun.com/latex/latex.action' />，则曲线______

设随机变量X的概率密度<img src='https://img2.soutiyun.com/latex/latex.action' />常数c=( )．

设<img src='https://img2.soutiyun.com/latex/latex.action' />，则du=( )．

设<img src='https://img2.soutiyun.com/latex/latex.action' />，则点x=1是f(x)的( )。

设f(x)=arctanx，则<img src='https://img2.soutiyun.com/latex/latex.action' />( )。

设<img src='https://img2.soutiyun.com/latex/latex.action' />(n=1，2…)，则E(X)=( )．

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A为n阶实矩阵，试证<img src='https://img2.soutiyun.com/ask/2020-11-27/975337127824512.jpg' />

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p＞1，证明不等式<img src='https://img2.soutiyun.com/ask/2021-01-18/979838709003026.png' />

设u=f(xyz)，则<img src='https://img2.soutiyun.com/latex/latex.action' />=( )

设<img src='https://img2.soutiyun.com/latex/latex.action' />则<img src='https://img2.soutiyun.com/latex/latex.action' />=( )．

设<img src='https://img2.soutiyun.com/latex/latex.action' />=( )

设<img src='https://img2.soutiyun.com/ask/2019-12-23/94594055571456.png' />，则当x=( )时，D=0。

设函数<img src='https://img2.soutiyun.com/ask/2019-12-21/945780553197574.png' />，则( )成立。

设a≠0,|r|＜1,求<img src='https://img2.soutiyun.com/ask/2020-10-26/972583970755153.png' />

设<img src='https://img2.soutiyun.com/shangxueba/ask/2022-04/24/826/20220424090836513.png' />，则A-B=()。