证明:若函数f（x)在R有任意阶导函数,且函数列{f^（n)（x)}在R一致收敛于极限函数φ（x),则φ（x)=ce^x,其中c是常数.

证明:若函数f(x)在a连续,则函数 <img src='https://img2.soutiyun.com/ask/2020-11-11/973957882099598.png' /> 在a都连续.

证明:若函数f(x)在[O,+∞)连续,且<img src='https://img2.soutiyun.com/ask/2020-11-12/974063888799517.png' />则<img src='https://img2.soutiyun.com/ask/2020-11-12/974063900815204.png' />

<img src='https://img2.soutiyun.com/1/2020-09-28/970149564848754.png' /> <img src='https://img2.soutiyun.com/1/2020-09-28/970149583787838.png' /> <img src='https://img2.soutiyun.com/1/2020-09-28/970149597026595.png' /> <img src='https://img2.soutiyun.com/1/2020-09-28/97014960848125.png' />

证明:若函数f(x)在[0,1]可导,且f(0)=0,<img src='https://img2.soutiyun.com/ask/2020-11-11/973975609415542.png' />有|f´(x)|≤|f(x)|,则f(x)=0,x∈[0,1].

证明:若函数f(x)在区间[a,+∞)上连续且有极限<img src='https://img2.soutiyun.com/ask/2020-12-13/976732708656138.png' />则(x)在区间[a,+∞)上是有界的.

证明:若函数f(x)在开区间I是下凸,则<img src='https://img2.soutiyun.com/ask/2020-11-11/973977682582121.png' />存在于f´-(x₀)与f´+(x₀),且f´-(x0)≤f´+(x₀).

证明.若函数f(x)在区间[-π,π]可积,且a_k,b_k,是函数f(x)的傅里叶系数,则<img src='https://img2.soutiyun.com/ask/2020-11-13/974121166578095.jpg' />有不等式 <img src='https://img2.soutiyun.com/ask/2020-11-13/974121183156043.png' /> 后者称为贝塞尔①不等式.(证明1),讨论积分<img src='https://img2.soutiyun.com/ask/2020-11-13/974121199972005.png' />

设函数f(x)和g(x)在[0,1]上有连续导数,且f(0)=0,f'(x)≥0,g'(x)≥0.证明:对任何a∈[0,1],都有 <img src='https://img2.soutiyun.com/ask/2020-12-13/97672399961901.png' />

证明:若函数f(x,y)在区域R连续,且对任意有界闭区域<img src='https://img2.soutiyun.com/ask/2020-11-14/974187340984076.png' />都有 <img src='https://img2.soutiyun.com/ask/2020-11-14/974187353662801.png' />

证明:若函数f(x,y)在R(a₁≤x≤b₁,a₂≤y≤b₂)连续, <img src='https://img2.soutiyun.com/ask/2020-11-14/974189428787492.png' />

证明:若函数f(x)在(a,+∞)连续,且<img src='https://img2.soutiyun.com/ask/2020-11-11/97395757022676.png' />则f(x)在(a,+∞)有界.

证明:若函数y=f(x)在[a,b]严格增加,且连续则反丽数x=f^-1(y)在点a=f(a)右连续,即 <img src='https://img2.soutiyun.com/ask/2020-11-11/973957297199144.png' />

若函数f(x)在[a,b]上可积，证明存在折线函数列<img src='https://img2.soutiyun.com/ask/2021-01-22/98018065819823.png' />

设函数<img src='https://img2.soutiyun.com/ask/2020-12-16/976976603992918.png' />,其中函数g(x)在(-∞,+∞)上连续,且 g(1)=5,<img src='https://img2.soutiyun.com/ask/2020-12-16/976976616554637.png' />,证明<img src='https://img2.soutiyun.com/ask/2020-12-16/976976676821084.png' />,并计算f''(1)和F'''(1).

证明:(1)若函数f在[a,b]上可导,且f'(x)≥m,则 <img src='https://img2.soutiyun.com/ask/2021-02-04/98128598322409.png' /> (2)若函数f在[a,b]上可导,且 <img src='https://img2.soutiyun.com/ask/2021-02-04/981285989538451.png' /> (3)对任意实数x₁,x₂,都有 <img src='https://img2.soutiyun.com/ask/2021-02-04/981286001647143.png' />

设函数f(x)在[01]上二阶可导,且f"(x)≤0,x∈[0,1],证明: <img src='https://img2.soutiyun.com/ask/2020-12-16/976976979900419.png' />

证明:若函数f(x)在区间I连续,且对任意有理数x∈I,有f(x)=0,则<img src='https://img2.soutiyun.com/ask/2020-11-11/973956935040429.png' />

设f(x)为连续函数，又<img src='https://img2.soutiyun.com/ask/2020-12-20/977330361227981.png' />， 证明: (1)若f(x)为奇函数，则F(x)为偶函数. (2) 若f(x)为偶函数，则F(x)为奇函数.

证明:若函数f(x,u)在矩形域R(a≤x≤b,a≤u≤β)连续,而函数a(u)与b(u)在区间[a,β]也连续,且<img src='https://img2.soutiyun.com/ask/2020-11-13/974144402448111.png' />有 a≤a(u)≤b,a≤b(u)≤b, 则函数<img src='https://img2.soutiyun.com/ask/2020-11-13/97414442394134.png' />在区间[a,β]连续.