e^x=1+x+(x^2)/2!+(x^3)/3!+(x^4)/4!+...(for all x)

lynn1132022-10-04 11:39:541条回答

e^x=1+x+(x^2)/2!+(x^3)/3!+(x^4)/4!+...(for all x)
证明上式,或者说明怎么到这个等式关系,e^x=1+x+(x^2)/2!+(x^3)/3!+(x^4)/4!+...(for all x),

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qinhuaiwuke 共回答了17个问题 | 采纳率100%
这是函数的幂级数展开式.学过就知道的
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Sunshine For All
Sunshine For All
The Beijing Sunshine Secondary School students are holding a charity show at the school hall of Beijing Sunshine Secondary School, Sunny Street, Sunshine Town.
Date: 29 April
Time: 7:30 p. m.一9:00 p. m.
We hope to raise money to help poor children go to school.
Ticket price: $20
Donations are welcome.
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7:30 p. m. Introduction
7:40 p. m. Songs
8:00 p. m. Break
8:15 p. m. Speech
8:30 p. m. Drama
9:00 p. m. End of the show
Project Hope is an organization that raises money to build schools and buy books for poor students.
We would like to thank the following for their help and support:
The teachers at Beijing Sunshine Secondary School
The Star Shopping Mall for the costumes
Sunshine Advertisement Company for the posters
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B.In the meeting room.
C.In the shopping mall.
D.At the school hall.
小题2:When will the charity show be held?
A.7:30 p. m.一9:00 p. m., 29 April.
B.7:30 a. m.一9: 00 a. m., 29 April.
C.7:30 a. m.一9: 00 p. m. 29 May.
D.7:30 p. m.一9: 00 p. m. 29 May.
小题3:Why do they want to raise money?
A.To build schools.
B.To help poor children go to school.
C.To buy books for poor students.
D.To hold the charity show
小题4:What can you do at 8:00 p. m.?
A.Watch a drama. B.Enjoy songs.
C.Have a rest. D.Listen to a speech.
小题5:Whom do the students want to thank?
A.Sunshine Advertisement Company for the posters.
B.The Star Shopping Mall for the costumes.
C.The teacher at Beijing Sunshine Secondary School.
D.All of the above.
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短文大意:本文是一则海报。介绍了北京阳光第二中学的学生将举行慈善演出的时间、地点、目的、节目演出安排、票价,以及协助举办单位等内容。
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小题2:由海报中的“Date: 29 April Time: 7:30 p. m.一9:00 p. m.”可知演出时间为“4月29日下午7:30—9:00”,故选A。
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小题5:由海报中的“We would like to thank the following for their help and support:”以及后面的内容可知,故选D。
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从叙述上容易推断,xt和At不是逆矩阵,而是转置
把你打的题目再读两遍,看看有什么毛病(不止一处)
再把题目要求讲清楚,是判断题还是选择题还是证明题
英语翻译Voltage,both phase to neutral and phase to phase,for all
英语翻译
Voltage,both phase to neutral and phase to phase,for all three phases and neutral to ground.Phase angles for each voltage relative to each other.The values shall be for every cycle and average for 200 milliseconds as per IEC 61000-4-30 simultaneously.
还不是很准确,不能说价值,应该是测量值,还有就是不能说阶段,应该是三相,相间电压。我主要是后边周期和200毫秒的地方我不明白,不太合适
99归真1年前1
sunjun2222 共回答了18个问题 | 采纳率94.4%
电压,阶段到中性和阶段到阶段,为所有三阶段和中性对地面.相位角为每电压相对.价值将同时是每周期和平均200毫秒根据IEC 61000-4-30.
英语问题解释一下意思:1.For all that...In spite of the fact that... 2.T
英语问题
解释一下意思:
1.For all that...In spite of the fact that...
2.The same is true of….
3.This offers a typical instance of….
4.We may quote a common example of….
可以举几个例子理解一下吗?
点击一下1年前3
杨家小将 共回答了20个问题 | 采纳率90%
1.For all that...虽然如此 In spite of the fact that...尽管,虽然
She may have some shortcomings,but she is a good mother for all that.
她可能有一些缺点,尽管如此,她还是一位好母亲.
He has great power and wealth,but is still unhappy for all that"
他有钱有势,可尽管如此却并不快乐.
In spite of the fact that her mother was a dressmaker,Mamie's clothes never looked smart .
虽然事实上她的母亲是一个裁缝,玛咪的衣服却从来不漂亮.
In spite of the fact that there is on report about their extinction,their output is greatly reduced.
尽管还没有鱼种绝迹的报道,但是它们的数量也大量减少.
2.The same is true of….相同的是.
The food is good and the same is true of the service.
吃的东西很好,服务质量也不错.
I believe the same is true of many other places,too.
我想这些情形,很多地方都有.
3.This offers a typical instance of….这提供了一个典型的实例
This offers a typical instance of moral decline.
这有个很典型的道德败坏的例子.
4.We may quote a common example of….我们可以引用一个常见的例子
We may quote A common example of this effect .
我们可以引用这种效应的一个常见例子.
We may quote A common example of mechanical resonance .
我们可以引用机械共振的一个常见例子.