住宅工程模板作业指导书

一道计算题,求简便运算,1-6/5+12/7-20/9+30/11-42/13+56/15-72/17=? 设f(e^x)=e^2x+5e^x,则df(lnx)/dx= f(lnx+1)=e^x+3x 求df(x)/dx 我是这样做的：先设u=lnx+1,x=e^(u-1),f(u)=e^e^(u-1)+3e^(u-10） df(x)/dx=e^e^(x-1)+3e^x-1可是答案等于df(x)/dx=e^e^(x-1)*e^(x-1)+3e^x-1 df(x)=lnx/xe^[(lnx)^2]dx则 f(x)=? what does the university life mean to you 要回答,不要翻译 请问I’m gonna bring my six-year-old daughter to watch you perform tonight.中的to watch you perform tonight ,是什么用法 为什么perform是动词原形? （ ）1.---I wish that my parents to watch my basketball match_____ tomorrow.----But they are always busy.A.will come B.would come C.had come D.came everybody, that is ,except his six-year-old daughter这句话that is 怎么理解? six-year-old 为什么不用复数?是合成词?///////////////////////////////////// 求最正规数学“乘号可以省略”定义和“算式中书写方式”.数学算式中乘号的写法定义是什么?如6÷2（1+2）成不成立?什么情况下可以省略、用点表示、必须用X表示,这些具体定义是什么?最好 fight的过去式是什么 fight的过去式 fight的过去式是什么, “fight”和“hear”的过去式 过去式(set---fight---) 英语翻译They can sayAnything they want to sayTry to bring me downBut I will not allow anyoneTo succeed hanging clouds over meAnd they can tryHow to make me feel that IDon't matter at allBut I refuse to falter to in whatI believe or loose faith in That's where you take me的中文翻译~要每句都有翻译的``~` 天通银持仓盈亏和平仓盈亏是什么意思? 辉山奶牛场养牛450头,其中百分之60是奶牛,现在又买回10头,现在奶牛占百分之几\? 奶牛场原有奶牛是450头最近又新购进150头奶牛场的奶牛,数量比原来增加了百分之几百分号前我留一位小数 奶牛场原有奶牛450头,最近又新购进150头.奶牛场的奶牛数量比原来增加了百分之几?（百分号前保留一位小数）现在的奶牛数量是原来的百分之几?（百分号前保留一位小数）不要百度，是自己 某奶牛场今年养奶牛351头,比去年多养91头,奶牛场今年养的奶牛数量比去年增加了百分之几?列式 小学科学四年级上册教学目标评估题第一单元(B)的答案 只要是四年级(上册)科学小知识就行 where is Jhon?He has gone to the _____.where is Jhon?He has gone to the _____.a.teachers b.teacher c.teacher's d teachers' 已知x>0,Y>0,求(x+1/2y)^2+(y+1/2x)^2的最小值.[x+(1/2y)]^2+[y+(1/2x)]^2 第三宇宙速度那是不是,地球的质量与飞行器的质量不同,所以太阳对其飞行器的引力就远小于对其地球的吗?那么他们的逃逸速度就有很大的差距了吗? 关于第三宇宙速度速度为16.7km/s,这个速度怎能逃脱太阳引力?太阳的重力加速度非常大,地球都要以30km/s的速度运行,如果一个人造小天体的速度超过11.2km/s就能逃出.那么岂不是被太阳吸进去吗? 第三宇宙速度是指什么 英语练习题 .一、句型转换.2.his bike isn't the same as mine.(改为同义句) his bike is ______ ____一、句型转换.2.his bike isn't the same as mine.(改为同义句)his bike is ______ ______ mine,3.my sister will learn (a traditonal c His idea isn't the same as mine同义句　His idea is ____ ____mine Where is Lily?she is under the tree.是什么意思 where is Lily from?她来自中国