求找高手帮忙盗号做题

积分(x-5)dx/(x^3-3x^2+4) 求高数解题高手帮下忙 我都想了一整天了_百度作业帮
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积分(x-5)dx/(x^3-3x^2+4) 求高数解题高手帮下忙 我都想了一整天了
积分(x-5)dx/(x^3-3x^2+4) 求高数解题高手帮下忙 我都想了一整天了
x^3-3x^2+4=(x+1)(x^2-4x+4)=(x+1)(x-2)^2用有理函数的方法所以(x-5)/(x^3-3x^2+4)=A/(x+1)+B/(x-2)+C/(x-2)^2两边同乘(x^3-3x^2+4)得到x-5=A(x-2)^2+B(x+1)(x-2)+C(x+1)对于任意x都成立令x=2-3=3C,C=-1令x=-1-6=9A,A=-2/3令x=0-5=4A-2B+CB=(5-8/3-1)/2=2/3所以(x-5)/(x^3-3x^2+4)=(-2/3)/(x+1)+(2/3)/(x-2)-1/(x-2)^2然后分开积分∫(x-5)/(x^3-3x^2+4)=-2/3 ln|x+1|+2/3 ln|x-2|+1/(x-2)+C=(2/3)ln|(x-2)/(x+1)|+1/(x-2)+C
1/(-2 + x) + 2/3 Log[-2 + x] - 2/3 Log[1 + x]请求各位英语界高手做做题,帮帮忙,特急的,考大学毕业证的,请高手们读懂题目意思做,本人将十分感谢·Directions: There are 10 incomplete sentences here. You are required to complete each sentence by choosi_百度作业帮
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请求各位英语界高手做做题,帮帮忙,特急的,考大学毕业证的,请高手们读懂题目意思做,本人将十分感谢·Directions: There are 10 incomplete sentences here. You are required to complete each sentence by choosi
请求各位英语界高手做做题,帮帮忙,特急的,考大学毕业证的,请高手们读懂题目意思做,本人将十分感谢·Directions: There are 10 incomplete sentences here. You are required to complete each sentence by choosing the appropriate answer from the four choices marked A, B, C and D. Please mark the corresponding letter for each item on Answer Sheet with a single line through the centre.1. Are you really being _____?A. inviting
B. invited
C. invites
D. invitation2. If an invitation must be refused, most people _____ a reason.A. order
D. expect3. She asked him if _____.A. he would marry her
B. he will marry herC. would he marry her
D. will he marry her4. I am _____ when I _____ some difficult words.A. come across
B. come up withC. come across
B. come up with5. People can _____ the internet and know the _____ of all the news around the world.A. details
B. detailedC. details
D. details6. _____ these issues, the rate of online growth does not appear to _____.A. slow down
B. slowC. slow down
D. slow7. It is evident _____ Mr. Brown doesn’t understand you.A. because
D. what8. I was walking in the park with a friend recently, and his cell phone _____, _____ our conversation.A. interrupt
B. interrupting
C. interrupting
D. interrupt9. Why _____ wood when you can use _____?A. plastic
B. plastics
C. plastic
D. plastics10. If only I _____ your advice at that time!A. took
B. would take
C. was taking
D. had takenSection BDirections: There are 10 incomplete sentences here. You should fill in each blank with the proper words or expressions given below, changing the form if necessary.
11. I didn’t _____ the story―everything I told you was true.12. Sheila shouldn’t have got lost because I gave her very _____ directions.13. Most children can _____ their mother by her voice.14. They decide to _____ the two small companies into one.15. The company _____ that it is not responsible for the pollution in the river.16. _____ ― I can’t follow you when you speak so fast!17. Without friends, he felt _____ in the city he had just arrived in.18. She loves her cat and often _____ it on the back.19. The picnic was _____ by a hard shower yesterday.20. She forget to _____ the letter into the envelope.跪求各位,,一定要认真做答, 由于补充问题文字有限,其他题目在http://user./这里的日志第一篇《英语题目》,,请高手们读懂题目意思做答本人十分感谢。。
这种题目不是英语为母语者出的,最好不要浪费时间!如果真想学会英语,十六个字:读英想英记英写英听英思英记英说英达到接近英语为母语使用者的水平了,做题不会有大问题,不一定满分,至少通过。学会英语,一定会做题。练会做题,不一定会英语。进步。三楼回答了,随机看了看,似无错。...
这么多才20分...
1.B2.D3.A4.C5.D6.A7.C8.C9.B10.A11.invent12.explicit13.identify14.merge15.make it clear16.slow down17.lonely18.pets19.interrupted20.insert
1B2C3A4C5C6A7C8C9A10B
The P90x Reviews application also prepares a diet strategy in your caseThis past weekend (hiking) was so calming it had been really hard to acquire motivated to workout this morning. I was lying ...要考试了,求C语言高手帮做题.感激不尽_百度知道
要考试了,求C语言高手帮做题.感激不尽
编写函数实现两个数据的交换,在主函数中输入任
意三个数据,调用函数对这三个数据从大到小排序。
提问者采纳
///&#47, int *y){ &#47!&#92,/
C-Free 4;/
veket的小号////// } printf(&quot, &c);////c) {
swap(&a, &c);//////Hello W///#include &// printf(&int main(){ //////;b) {
swap(&a;/ if(a&/&#47, int *y); /&#47, %/&#47, &a;&#47, c);/&#47, &b);// *x = *y; return 0;n&//&#47.1////////).5/&#47, &b;%d;///////// } if(b&&#47, &c);// temp = *x; } if(a&/&#47.4;
scanf(&/}void swap(int *x;&#47, %d\// *y =/&#47.h&%d%d%d&/;/&#47///void swap(int *x;//n&c) {
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3个数据不多,可以两两分别比
两两对比也不会啊...能不能给分答案呢.
int a,b,c,scanf(%d%d%d,a,b,c);if(a&b){temp=a;a=b;b=}if(a&c){temp=a;a=c;c=}if(b&c||a&c){temp=b;b=c;c=}printf(%d%d%d,a,b,c);
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出门在外也不愁一个初中生的数学题,求高人帮忙解答,最后写出详细的答题过程,一步一步来,拜托了。_百度知道
一个初中生的数学题,求高人帮忙解答,最后写出详细的答题过程,一步一步来,拜托了。
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提问者评价
太给力了,你的回答完美地解决了我的问题,非常感谢!
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原式=2根号3+(根号3-1)(根号3+1)分之2(根号3+1)-1
=2根号3+根号3+1-1
能把图拍清楚一点吗?看不清。图片右上角是什么符号?看不清。
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出门在外也不愁求计算机高手帮忙做题_百度知道
求计算机高手帮忙做题
Excel自动以科学计数法形式表示 2,下面表述错误的是【 】. 在Excel单元格中输入数值数据时,表示单元格地址时,然后拖动该单元格填充柄至A2,工作表与单元格之间的、小数点和数字外. 在Excel中; 3. 在Excel单元格中输入文本型数据. 1. ,然后拖动该单元格填充柄至A2. 10E+3 4. 空 4. 15 2. 隐藏列 3. 在A1单元格中输入“一月”. 输入的数值数据无效 3; 2. =100000% 2.MEM
2 .XLS 2,双击列标右边界可以【 】
( 1 )分 1. 超长部分不会丢失 4,与它不相等的表达式是【 】
( 1 )分 1. 选中列
3 . 列可以“隐藏”. 30 3. 输入数字超过当前单元格规定的宽度时. 单元格最多显示数字位数为16位 4,但该列内容可能会丢失 4,000
8 ,则A2单元格中内容是【 】
( 1 )分 1. &#47. 输入数值型数据时除符号,可用鼠标指针指向它,单元格中的数据会呈“###”显示 3. 在Excel中. 在单元格中不会显示错误信息 2. 输入数字超过当前单元格显示宽度时. . 自动调整列宽 2. =1000&#47. 不允许一次选定多个不连续的单元格 4、行号与之对应
5 . 当前工作表中的单元格只有唯一的列号,允许出现其它一些特殊符号
6 .XLT 4,单击鼠标左键即可 2. 在A1单元格内输入“15”. . 一
7 . 无须增加单元格宽度
( 1 )分 1,当宽度大于单元格宽度时,有关列的表述. 输入的字符超宽时内容会丢失
10 ,下面正确的说法是【 】
( 1 )分 1.DOC 3,工作簿文件的扩展名是【 】
( 1 )分 1. 在Excel中。
( 1 )分 1. 选定某单元格时,下面表述错误的是【 】
( 1 )分 1. 一次不能“隐藏”多列 3,则A2单元格中内容是【 】
( 1 )分 1. . 锁定列 4、必须使用【 】分隔. 在Excel单元格中输入数值1000. 在Excel中. 被选定的单元格称活动单元格 3. ;1 3!
9 . 二月 3. 在Excel中. | 4,下面表述错误的是【 】
( 1 )分 1. &#92. 一月 2. 工作表中的列数不允许超过256 2. 空 41
提问者采纳
1124323411 楼上的错,我是信息技术教师
提问者评价
老师 第四题选错了。辛苦了 谢谢
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