设f（x)连续,且（A为常数).求导数φ'（x),并讨论φ'（x)的连续性.

A、A=1 B=0 B、A=B=0.5 C、A=0 B=1 D、A=0.5，B=<img src="/ananas/latex/p/24775">

A.<img src='https://img2.soutiyun.com/ask/2020-10-04/970660847536956.png' /> B.<img src='https://img2.soutiyun.com/ask/2020-10-04/970660856247455.png' /> C.F(a) D.2F(a)-1

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).

设f(x)在连续，且满足关系式：<img src='https://img2.soutiyun.com/ask/2020-12-20/977331812959016.png' />，求f(x).

设f(x)具有一阶连续导数，F(x)=f(x)(1+|sinx|)，则f(0)=0是F&39;(0)存在的( )． (A) 必要但非充分的条件 (B) 充分但非必要的条件。 (C) 充分必要条件 (D) 既非充分也非必要条件

设<img src='https://img2.soutiyun.com/latex/latex.action' />可导，求F(x)=f[φ(x)]的导数

设f(x)有二阶连续导数，f(π)=2，<img src='https://img2.soutiyun.com/ask/2021-01-13/979408566018361.jpg' />求f(0)。

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' />

设φ(x)在点α连续，f(x)=｜x-α｜φ(x)，求f-(n)和f+(α)，问在什么条件下f(α)存在。

设随机变量X的密度函数为φ(x)，且φ(－x)＝φ(x)，F(x)为X的分布函数，则对任意实数a，有()． <img src='https://img2.soutiyun.com/ask/uploadfile/2160001-2163000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' />

设f(x)在[0,2]上连续,且f(x)+f(2-x)≠0,求 <img src='https://img2.soutiyun.com/ask/2020-12-09/976373200636763.png' />

设f(x)在[a,b]上连续,且<img src='https://img2.soutiyun.com/ask/2020-11-02/97316922162267.png' />,求<img src='https://img2.soutiyun.com/ask/2020-11-02/973169234274393.png' />.

设函数<img src='https://img2.soutiyun.com/ask/2020-08-18/96660742963403.png' />其中g(x)有二阶连续导函数，且g(0)=1. (1)确定a的值，使f(x)在点x=0处连续； (2)求f'(x)； (3)讨论f'(x)在点x=0处的连续性.

设函数f(x,y)在(x0，y0)的某邻域内具有连续二阶偏导数，且<img src='https://img2.soutiyun.com/ask/2019-07-12/931776851413807.png' />，则<img src='https://img2.soutiyun.com/ask/2019-07-12/931776867607056.png' />()。 A.必为f(x,y)的极小值 B.必为f(x,y)的极大值 C.必为f(x,y)的极值 D.不一定是f(x,y)的极值

设f(x)为<img src='https://img2.soutiyun.com/ask/2021-02-02/981112914240121.png' />上以2π为周期，且具有二阶连续导数的函数, 记 <img src='https://img2.soutiyun.com/ask/2021-02-02/981112923970678.png' /> <img src='https://img2.soutiyun.com/ask/2021-02-02/981112932118144.png' />

设f(x,y)具有连续偏导数,且满足<img src='https://img2.soutiyun.com/ask/2021-01-10/979124316503936.png' />求<img src='https://img2.soutiyun.com/ask/2021-01-10/979124324709406.png' />.

设函数f(x)在有限开区间(a,b)内有导数,且 <img src='https://img2.soutiyun.com/ask/2020-12-12/976648548009352.png' />

.设函数u=f(x,y,z)有连续偏导数，且<img src='https://img2.soutiyun.com/ask/2021-01-02/978463716012693.png' />是由<img src='https://img2.soutiyun.com/ask/2021-01-02/978463730334512.png' />所确定的隐函数，求du.