函数当x为任何实数时，都有确定的值，但它的泰勒展开式：=1-x²+x⁴+...仅只当|x|＜1时

A . 0 B . 1 C . -1 D . 1／2

A .https://assets.asklib.com/psource/2015102914171256962.jpg B .https://assets.asklib.com/psource/2015102914172646978.jpg C .https://assets.asklib.com/psource/2015102914174241489.jpg D .https://assets.asklib.com/psource/2015102914180033916.jpg

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

二维连续型随机向量(X，Y)的联合概率密度为<img src='https://img2.soutiyun.com/ask/2020-12-31/978284874696433.jpg' /> 试确定A的值并求(X，Y)的联合分布函数。

A．直线 B．正常分布曲线 C．波动线 D．对称S型曲线 E．长尾S型曲线

确定a，b的值，使函数<img src='https://img2.soutiyun.com/ask/2020-12-19/97725510921456.png' />在(-∞，+∞)内处处可导，并求它的导函数。

试确定常数a，b的值，使函数<img src='https://img2.soutiyun.com/ask/2020-12-19/977254184261656.png' />在x=1出连续且可导。

函数<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671257/2015102914165070741.jpg' />在x=2处的泰勒级数展开式为（）． A．<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671257/2015102914171256962.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671257/2015102914172646978.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671257/2015102914174241489.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671257/2015102914180033916.jpg' />

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)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.

设连续随机变量X的密度函数p(x)是一个偶函数，F(x)为X的分布函数，求证对任意实数a＞0，有 <img src='https://img2.soutiyun.com/ask/2020-08-03/965297607418991.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.

<img src='https://img2.soutiyun.com/ask/2020-11-27/975350601906185.png' />

设函数<img src='https://img2.soutiyun.com/ask/2020-12-11/976547144899132.jpg' />在Rez=x＞0时解析，试确定a的值。

以z₀为展开中心,把下列各函数展开成洛朗级数(包括泰勒级数作为它的特殊情形),并指出展开式成立的区域: (1)<img src='https://img2.soutiyun.com/ask/2021-01-15/979557772361073.png' />; (2)<img src='https://img2.soutiyun.com/ask/2021-01-15/979557781103573.png' />; (3)<img src='https://img2.soutiyun.com/ask/2021-01-15/979557792907248.png' />.

确定下列函数的定义域及求函数值f(0)f(√2)f(a)(a为实数)，并作出图形 <img src='https://img2.soutiyun.com/ask/2020-08-17/966501518537991.png' />

A．对称S型曲线 B．正常分布曲线 C． 直线 D．波动线 E．长尾S型曲线

将函数<img src='https://img2.soutiyun.com/ask/2020-08-10/96591628820966.png' />展开成关于x-1的泰勒级数。