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设函数f(x)在x=1处连续且可导,则().
A . a=1,b=0
B . a=0,b=1
C . a=2,b=-1
D . a=-1,b=2
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设函数f(x)在[0,+∞)上连续,且
https://assets.asklib.com/psource/2015102916502090066.jpg
满足,则f(x)是()。
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
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设f(x)是定义在(-∞,+∞)上的连续函数,则().
A .https://assets.asklib.com/psource/201510281730216011.jpg
必收敛B . 当时https://assets.asklib.com/psource/2015102817304539684.jpg
,有https://assets.asklib.com/psource/2015102817310390466.jpg
收敛C . 当https://assets.asklib.com/psource/2015102817312471494.jpg
存在时,有https://assets.asklib.com/psource/2015102817314434109.jpg
收敛D . 当且仅当https://assets.asklib.com/psource/2015102817320265605.jpg
均存在时,有https://assets.asklib.com/psource/2015102817322045792.jpg
收敛
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设f(x)是连续函数,且
https://assets.asklib.com/psource/2015102916492947397.jpg
,则f(x)=()。
A . x2B . x2-2C . 2xD .https://assets.asklib.com/psource/2015102916495496748.jpg
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设连续函数f(x)满足,且f(0)=1,求f(x).
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).
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设函数f(x)二阶连续可导,且f(0)=0,f'(0)=1,求
设函数f(x)二阶连续可导,且f(0)=0,f'(0)=1,求<img src='https://img2.soutiyun.com/ask/2020-12-08/976282425721188.png' />
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(x)是定义在实数集R上的非零连续函数,且满足方程()则称函数f(x)是指数函数。
<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' />
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设函数f(x)在区间[0,+∞)上连续、单调不减且f(0)≥0.试证函数在[0,+∞)上连续且单调增加[其中n>0]
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].
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设f(x)为[-a,a]上的连续函数,证明:(1)若f(x)是偶函数,则是[-a,a]上的奇函数;(2)若f(x)是奇函数
设f(x)为[-a,a]上的连续函数,证明:
(1)若f(x)是偶函数,则<img src='https://img2.soutiyun.com/ask/2020-10-12/971368555517115.png' />是[-a,a]上的奇函数;
(2)若f(x)是奇函数,则<img src='https://img2.soutiyun.com/ask/2020-10-12/971368586317876.png' />是[-a,a]上的偶函数。
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设函数f(x)在[a,b]上连续,且f(x)>0,证明:在(a,b)内存在一个ξ,使得
设函数f(x)在[a,b]上连续,且f(x)>0,证明:在(a,b)内存在一个ξ,使得
<img src='https://img2.soutiyun.com/ask/2021-01-14/979465674691464.png' />
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设f是从X到X的函数,证明对于所有m、n∈N,f<sup>m</sup>·f<sup>n</sup>=f<sup>m+n</sup>
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设函数f(x)满足f(0)=0.证明f(x)在x=0处可导的充分必要条件是:存在在x=0处连续的函数g(x),使得f(x)=xg(x),且此时成立f(0)=g(0).
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设f(x)为连续函数,且f(0)≠0,则=().
设f(x)为连续函数,且f(0)≠0,则<img src='https://img2.soutiyun.com/ask/2020-12-13/976723029730536.png' />=().
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设函数f(x)在[0,1]上连续,且f(0)= f(1),证明一定存在x∈(0,)使得f(x<sub>0</sub>)= f(x<sub>0</sub>+).
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(x<sub>0</sub>)= f(x<sub>0</sub>+<img src='https://img2.soutiyun.com/ask/2020-12-20/977320902712985.png' />).
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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]
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' />
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设函数f(x)具有一阶连续倒数.且f(0)=0,fˊ(0)=2,求lim(x→0)f(1-cosx)/tanx²;
是一阶连续导数(上面打错)
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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等式成立.
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.
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设函数f(x)在区间[a,b]上连续,且f(x)≥0,那么 (x)dx在几何上表示什么?
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?
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设f(x)是[a,b]上的有限函数,若存在M>0,使对任何ε>0都有则f(x)是[a,b]上有界差函数.
设f(x)是[a,b]上的有限函数,若存在M>0,使对任何ε>0都有<img src='https://img2.soutiyun.com/ask/2020-08-13/966171531356788.png' /><img src='https://img2.soutiyun.com/shangxueba/ask/50574001-50577000/50574553/spacer.gif' />
则f(x)是[a,b]上有界差函数.
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设函数其中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)
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.
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设函数,其中函数g(x)在(-∞,+∞)上连续,且g(1)=5,,证明,并计算f''(1)和F'''
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).
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设f(x)为上以2π为周期,且具有二阶连续导数的函数, 记
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' />
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证明:(1)若函数f在[a,b]上可导,且f'(x)≥m,则(2)若函数f在[a,b]上可导,且(3)对任意实数x<sub>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x<sub>1</sub>,x<sub>2</sub>,都有
<img src='https://img2.soutiyun.com/ask/2021-02-04/981286001647143.png' />
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.设函数u=f(x,y,z)有连续偏导数,且是由所确定的隐函数,求du.
.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.