高等数学理第一次作业

一：---Have you seen the film Steal Happiness?---No,but i would rather i _____ it before.A:have seen B:had seem二：帮忙详细介绍一下一大堆形容词修饰一个名词时的顺序,例如a lovely old chinese vase之类的. My uncle also did them and he only lived _____ eighty.A.in B.at C.to D.being So far as population is concerned.New York is( )the biggest cities in the world.A about B on C among D farAt times the balance in nature( ),resulting in number of possible unforessen effects.A is disturbing B is disturbed C has disturbed D will distu 13,After the heavy rain,the river ______.A,is risen B,is raised C,rose D,raised 14,this kind of thing _____ already _____ somewhere in the world.A,has been,happened B,has,happened C,will,happen D,are,happening 15,the film _____at night.And then we wa (1/94*95)+(1/95*96)+(1/96*97)+(1/97*98)+(1/98*99) 若x-3=y-2=z-1求x²+y²+z²-xy-yz-zx的值过程 已知x+y+z=1,且xy+yz+zx=0,求x²+y²+z²的值. 如果x-y=m,y-z=n,那么x² + y² +z² -xy-yz-zx的值等于（ ）A.mn B.(m²+n²)n C.m²+n²+mn D.mn(m+n)虽然是填空题,还是希望各位能写出过程来,毕竟我要弄懂啊,. 这两题怎么写要简算 这题怎么写啊,能简算吗 英语定语从句的几道题目,用定语从句翻译下面句子 1.站在树下的男孩是我的哥哥2.我昨天借的书很有趣3.他是去年教我们物理的老师4.我喜欢漂亮的电影明星5.他们正在谈论他们以前看过的电 初三上册的英语题（关于定语从句的）组合下列两个句子为一个句子还要翻译!1.My father took photos.They were like by everyone.2.This is a picture.We found the picture in an old shop.3.Have you seen the clothes?I bought the 如果x-y=m,y-z=n,那么,x的平方+y的平方+z的平方-xy-yz-zx的值等于多少? 这怎么写要简算 怎么写 ,能简算要简算 英语题（尽量说明理由）1Tom,will you ( )the Chinese club?(应该填join 还是join in,为什么2Every player wants to ( )the( )( ) in the Olympics.（赢得金牌）3I like football very much.I like football( )( ).(同义句4THE Sthdents wi （1）你能算出阴影部分的面积吗?（单位：cm）（2）学校综合楼前面有一块长方形空地,长25cm、宽16cm.你能在这块空地上设计一个漂亮的花圃,使它的面积约是150平方米吗?答得好.第一个问题不 化简cosα∧3×cos3αsinα∧3×sin3α 1.Hearing the exciting news,the Chinese people all _______ at that moment.A.are cheer B.cheered on C cheered up D.cheers out2.Many buildings were ______ and new buildings are being built.A.put down B.pulled down C.climbed down D.fell down 已知O＜α＜π,且sinα,cosα是方程5x2-x+m=0的两个根,求：tan(3π-α) sin3α+cos3α 已知a是方程x²-2009x+1=0的一个根,试求a²-2008a+2009/a²+1的值 已知a+b=10,ab=21,求a²+b² 已知a>b,求证a(b²+1)-b(a²+1)>0 求当x趋近于a时,(sin x - sin a) / (x - a)的极限 当x→∞时,x*sin(1/x)的极限=?麻烦写下过程 当x趋于2时 sin(x-2)/x-2的极限是多少?还有：当X→0时,|sinx|/x怎么是不存在啊? 已知有理数a,b,c满足|a－b－3|＋（b＋1）²＋|c－1|＝0,求（－3ab）·（c-1）的值 已知(x+y+x)的平方=25,xy+yz+xz=7,那么x的平方+y的平方+z的平方的值是? 求[in(1+sin.^2(x))-x^2]/sin^4(x);当x趋于0时候的极限如题,求指教 sin（x-1）／x-1 的极限是多少?x趋于1 小学五年级英语上册第2单元B2的句子的翻译?人教版 的第2单元 B2的句子翻译 已知,当x=2时,ax³+bx²+cx+7==10,则当x=-2时,ax³+bx²+cx+7=