二年级作业布置图片大全

数列｛an｝满足a1=1,a2=3,an+2-4an+1+4an=0数列满足A1=1,A2=3.并且An+2-4An+1+4An=0.1、证明{An+1-2An}是等比数列 I have so many t__ to do every dang 首字母填空答案 求Mercy Mercy Me-Craig David歌词翻译 已知数列an中,a1=-1,an+1乘以an=an+1-an则数列通项an=?标答是：-1/n? 为什么过程不可以是：an+1(1-an)=an,an+1=an/1-an,an+1-an=-1?所以an=-1-n+1=-n?麻烦解释下 已知数列an满足a1=4,an=n+1/n-1乘以an-1则an= 数列an中,a1=1/2,an=(n-1)/(n+1)乘以an-1,求an的通项. 数列a1=1,an=2an-1+1（n≥2,n属于N^*）的第5项是? could i use your pen ? A.yes ,you can B.yes,sure C.no,you can't 求描写人物色彩的片断或诗句.快,2天内. 用词语写段落用枝繁叶茂 青山碧岭 茂密 树丛搭窝筑巢 阵阵松涛 碧波 荡漾来组段 梁山好汉表现义的故事要两个,概括一下武松打虎的故事情节关于武松还有什么故事,一个就可以了 a1=2,a(n+1)=2an,写出数列前5项,猜想an并证明a1=2a2=4a3=8a4=16a5=32如何证明?an=2的n次方 我要武松打虎的故事简介,字数不低于150字,不高于300字.字数不要过多. ——Can it be our English teacher?——Let me see.I'm not sure.it____ beA.must B.can C.might D.will 请帮我用英语复述这篇文章!teenagers who listen to the save music often have a common look.one hot style in music and fashion is hip-hop.simply put,hip-hop fashions are loose-fitting street clothes.the style includes baggy pants,sweatshirts 怎么复述英文文章?明天就要比赛了,咋办? 复述下面的文章(英语)The main goal of the World Bank is to fight poverty.But,for almost ten years,the World Bank also has investigated financial crimes by government and bank officials.In nineteen ninety-six,former World Bank President James 求下面一片英语短文复述!What a difference a day makes! My father and I decided to go to Penang Hill today. We wanted to walk up to the top, but then it started raining a little so we decided to take the train. We waited over an hour it was 设直角三角形两直角边分别是a和b,斜边是c,周长是C,如果b=√54,c=√150,求周长C. 《小石潭记》的主旨句是什么 《小石潭记》的主旨句!急 小石潭记的主旨是什么 写出下列每个数列的前五项{an+1=n+1/an,a1=3 办过年手抄报,可以写一些什么?内容别太多 “清风诗苑”对联：我问青山山问我【一兮清风】出句：我问青山山问我【一兮清风】 （注：通过山的回声体悟人生.） 14小英雄雨来,分成六段,每段用一句话概括, 原句：What's the number of your telephone,please?样子：What‘s ,,,please? 复述小英雄雨来!（500字~600字） 雪中对联帮我填一填：1.醉汉骑驴,颠头簸脑算酒帐艄公摇橹,打躬__ __讨船钱2.雪里白梅,雪__白梅梅__雪风中绿竹,风__绿竹竹__风(好一个__字,把风声竹影写活了!)偶感激不尽! 找一首关于《青花瓷》还是《菊花台》里面是化学版的歌.、 关于写雪的对联 急 急 急 急 有关于雪的对联吗?