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a(n+1)=Pan+Q这样的数列可以用构造函数求an通项,但是当P为常数且小于0.Q=2n-1这样时怎么求通项即当P或Q不为常数时,这样的数列怎么求,我知道当P大于0的求法,但是P小于0呢 英语翻译1.When people talk of a viras these days ,they are probably talking z\about computer viruses that have the power to wipe out all the important work in the computers.this virus hai the power to make military systems,big banks,airports,hosp 难以言状的近义词什么? 求2012年语文会考说明 急 what you can do best _______organizations Organizations work _______ all kinds of purposes分别填to for（每个词只能用一次） 求2012语文会考说明词语表所有注音……谢……暧昧 安逸……………… 2012年语文会考说明音型. 数列｛an｝满足a1=1且an=3a（n-1）-2n+3（n=2,3……）求a1,a2并证明数列|an-n|是等比数列 Because I'm the best there is at what I do.请帮我讲解一下这句话的结构, Very nice,very neat,Has teeth,but cannot eat.What is it? 用所给词的适当形式填空why don't you ask ----(anything) to help you?the satisfied ----(feel) stop him from trying best.the teacher's only ---(think) was for his students.选择( )the keys are pressed but nothing ---- on the screen.A is appe 英语高手请进 Jin Yong is one of the greatest and eldest ___ writers.He is still_____A.living;alive B.living;living C.alive;living D.alive;aliveliving不是不仅可作定语,也可以作表语?为什么选A不选B 【首先注明：每道题必须都有讲解,通俗易懂的,有事实根据】1.He said that the moon _______(travels/traveled)round the earth.2.She said ______(help) others changed her life.3.She said _____(help)the poor changed her life.4.It seem I will never for get the day when I meet you! 帮我看看这句话有错吗I'm so lucky to pass the exam..I'm so lucky to pass the exam..这样说有语法错误吗．．? 初三英语高手请进!完成下列句子：1.Your brother used to be very shy,[ ] he ?2.What if it [ ](rain) heavily tomorrow?第二句要填的是rain的某一个时态,rain是做提示的.已知标答是didn't ,rains,谁能告 英语翻译 改为同义句 Keeping a cat as a pet is very intereting .___very interesting ___ ___ a cat as a pet. Kate finished her homework ,she began to go to bed改为复合句 介绍山海关 天下第一关（山海关）英语介绍,要求300词左右.最好附汉语意思. 王家大院用英语怎么说,还有山海关用英语怎么说 《山海关》中用咽喉来形容山海关,说明了什么? 状的近义词是什么 Children,you must do the home work( )(填反身代词) 英语翻译问题主要在come with 主要是come 的原因， 能书善画是第一个字和第三个字是近义词 再接再厉是ABAC形式 前仆后继和舍生取义都是第一个和第三个能书善画是第一个字和第三个字是近义词再接再厉是ABAC形式前仆后继和舍生取义都是第 填近义词：（胡）思（乱）想（）书（）善（）情（）志 Sometimes it lasts in love but sometimes it hurts instead.这句话怎么连读? 有关保护文物的作文 保护文物 爱我家乡的作文关于灵石的 比如王家大院 资寿寺 旌介等等 What areyou doing vacation?Me?I’m looking my mother at home.急用!A:for,after B:for,for C:for a,after D:for a,forWhat are you doing .......vacation?Me?I’m looking my mother at home