设函数f（t，x)在区域 上连续， 方程满足解的存在唯一性条件，其零解稳定，并且存在x₁＞0和x<sub>2⌘

A . 4／3 B . -4／3 C . -2 D . 2

A . ['['xe-xB .https://assets.asklib.com/psource/2015102916504043916.jpg C .https://assets.asklib.com/psource/2015102916505413257.jpg D .https://assets.asklib.com/psource/2015102916510519496.jpg

A . -1／f″（t） B . 1／［f″（t）］ C . -1／［f″（t）］ D . 1／f″（t）

A . ['y=f（x）+chttps://assets.asklib.com/psource/2015102616471385225.jpg B . y=f（x）https://assets.asklib.com/psource/2015102616471475863.jpg -https://assets.asklib.com/psource/2015102616471475863.jpg +cC . y=f（x）-1+chttps://assets.asklib.com/psource/2015102616471385225.jpg D . y=f（x）-1+chttps://assets.asklib.com/psource/2015102616471475863.jpg

设连续函数f(x)满足<img src='https://img2.soutiyun.com/ask/2021-01-02/978466547476644.png' />，且f(0)=1，求f(x).

<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' />

设函数f(x)在区间[0,+∞)上连续、单调不减且f(0)≥0.试证函数 <img src='https://img2.soutiyun.com/ask/2020-12-13/976722177817809.png' /> 在[0,+∞)上连续且单调增加[其中n＞0].

A.可导函数 B.不可导函数 C.线性函数 D.非线性函数

设函数f(x)在(0,+∞)内连续,f(1)=5/2,且对任何正数x和t,满足条件 <img src='https://img2.soutiyun.com/ask/2020-12-13/976721902069037.png' /> 则f(x)=().

设非线性函数f(x)在[a,b]上连续,在(a,b)上可导,则在(a,b)上至少存在一点η,满足 <img src='https://img2.soutiyun.com/ask/2020-12-16/976958565155156.png' /> 并说明它的几何意义.

A．4／3 B． -4／3 C． -2 D． 2

A．-1／f″（t） B． 1／［f″（t）］² C． -1／［f″（t）］² D． 1／f″（t）

设函数f(x)在[0，1]上连续，且f(0)= f(1)，证明一定存在x∈(0,<img src='https://img2.soutiyun.com/ask/2020-12-20/977320815878019.png' />)使得f(x₀)= f(x₀+<img src='https://img2.soutiyun.com/ask/2020-12-20/977320902712985.png' />).

设f(x)是以T为周期的连续周期函数(-∞＜x＜+∞).证明: <img src='https://img2.soutiyun.com/ask/2020-12-13/976722698275577.png' />

设函数f(x)在闭区间[0,1]上连续,在开区间(0,1)上大于零,并满足 <img src='https://img2.soutiyun.com/ask/2020-12-16/976979475299148.png' /> 进一步,假设曲线y=f(x)与直线x=1和y=0所围的图形S的面积为2. (1)求函数f(x); (2)当a为何值时,图形S绕x轴旋转一周所得旋转体的体积最小？

设f(x)是以T为周期的周期函数,且f(x)在任意有限区间上连续,试证:对任意的a等式<img src='https://img2.soutiyun.com/ask/2021-01-14/979465028702515.png' />成立.

设函数f(x)在区间[a,b]上连续,且f(x)≥0,那么<img src='https://img2.soutiyun.com/ask/2020-11-13/974109593488152.png' />(x)dx在几何上表示什么？

设D为平面有限闭区域，f(x，y)，g(x，y)在D上连续，且g(x，y)≥0，证明：存在(ξ，η)∈D，使得<img src='https://img2.soutiyun.com/ask/2020-12-08/976284059780651.jpg' />

设f在[a,b]上连续,x₁,x₂,...,x_n∈[a,b],另有一组正数<img src='https://img2.soutiyun.com/ask/2021-02-03/981218636626213.png' /> 满足<img src='https://img2.soutiyun.com/ask/2021-02-03/981218643623613.png' />证明:存在一点ξ∈[a,b]，使得 <img src='https://img2.soutiyun.com/ask/2021-02-03/981218652397115.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).

设方程F(x,yz)=0确定隐函数z=z(x,y),求<img src='https://img2.soutiyun.com/ask/2021-01-10/97912592889916.png' />注:做这类题时,作为约定:总认为其中函数F满足链式规则的条件,而且混合偏导数与求导次序无关.