设函数 <img src="https://nimg.ppkao.com/2019-10/limiao/2019103017120286681.jpg?sign=66232e396973e66411ad2dbe09e4b134&t=62e3c1f6" /> ,应选择什么样的常数a,使得f(x)成为在(-∞,+∞)内的连续函数。
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A、下列函数哪些是算符<img src="https://img.ppkao.com/2019-04/liyunao/2019041013094234845.jpg" />的本征函数,其本征值是什么?
<img src="https://img.ppkao.com/2019-04/liyunao/201904101309527982.jpg" />
A、写出下列函数的功能。
<img src="https://img.ppkao.com/2018-07/lina/2018072509545255304.jpg" />
<img src="https://img.ppkao.com/2018-07/lina/2018072509552461386.jpg" />
A、写出下列函数的功能。
<img src="https://img.ppkao.com/2018-07/lina/2018072514585069201.jpg" />
<img src="https://img.ppkao.com/2018-07/lina/2018072514585454790.jpg" />
A、A.AB
B.<img src="https://img.ppkao.com/2019-04/wangjue/2019041612322333927.jpg" />
C.<img src="https://img.ppkao.com/2019-04/wangjue/201904161232269440.jpg" />
D.AB+C
A、逻辑函数<img src="https://img.ppkao.com/2019-04/wangjue/2019041614502372823.jpg" />的反函数<img src="https://img.ppkao.com/2019-04/wangjue/2019041614503640216.jpg" />。
A、A.<img src="https://img.ppkao.com/2019-04/xiaotian/201904121621063148.jpg" />
B.<img src="https://img.ppkao.com/2019-04/xiaotian/2019041216210959959.jpg" />
C.<img src="https://img.ppkao.com/2019-04/xiaotian/2019041216211392394.jpg" />
D.<img src="https://img.ppkao.com/2019-04/xiaotian/2019041216211784478.jpg" />
A、A.Y=ABC
B.<img src="https://img.ppkao.com/2017-06/zengxiaofang/20170626164152564.jpg" />
C.Y=AB+C
D.<img src="https://img.ppkao.com/2017-06/zengxiaofang/2017062616420690657.jpg" />
A、A.上部设2<img src="https://img.ppkao.com/2018-07/wenxueying/2018071612381615622.png" />22的通长钢筋
B.上部设41<img src="https://img.ppkao.com/2018-07/wenxueying/2018071612381615622.png" />2的架立钢筋
C.A轴支座上部纵筋与B轴支座两侧的上部纵筋相同
D.B轴支座两侧的上部纵筋为3<img src="https://img.ppkao.com/2018-07/wenxueying/2018071612381615622.png" />22+3<img src="https://img.ppkao.com/2018-07/wenxueying/2018071612381615622.png" />25
E.C轴支座上部纵筋设在下排的钢筋是4<img src="https://img.ppkao.com/2018-07/wenxueying/2018071612381615622.png" />22
A、设随机变量X的分布函数为<img src="https://img.ppkao.com/2019-04/wuacheng/2019041215560881687.jpg" />则P{X≥2}=()
A、系统方框图如下,试画出其信号流图,并求出传递函数<img src="https://img.ppkao.com/2018-07/yuanhao/2018071916523731903.jpg" />。
<img src="https://img.ppkao.com/2018-07/yuanhao/2018071916525237915.jpg" />