数学的运算符号大全

以 垃圾是放错地方的财富 为话题 ,写一篇800字以上的作文! 什么是马克思主义的基本立场、观点和方法 英语翻译Sky is so blue too blue,love is a growth in the cliffs on the edge of flower removal on the need to want to have the courage to ,coffee is lonely without cups.I am lonely without you.When the tears streaming down only know love your heart 英语翻译I didn't do well in English at the begining.I can't remember the words.I can't speak well.I was afraid of making mistakes.I have so many problems with my English.But I like English.I want to learn it well.So I preview the day’s lesson b 英语翻译처음처럼 그때처럼 너를 다시 만나러가는 이순간이 믿지질 않아 가는ᆫ 公式ΔG'＝nFΔE'是什么意思?那么公式里面的n,F,E分别代表什么？ 如图,四边形ABCD是菱形,点M,N分别在AB,AD上,且BM=DN,MG∥AD,NF∥AB,点F,G分别在BC,CD上,MG与NFE相交于点E,求证：四边形AMEN,EFCG都是菱形 帮我下 我要做作业= = 顾颉刚的“颉”字应读“鞋”还是“节”? 谁知道顾颉刚的颉字如何读,这是一个多音字 顾颉刚:怎样读书 为什么来字的第三笔读点 已知函数f(x)=ax2+bx+c(a＞0,b∈R,f(x)=ax2+bx+c(a＞0,b∈R,c∈R)（1）若函数f(x)的最小值是f(-1)=0,且c=1,F(x)=f(x)x＞0,-f(x)x＜0,求F(2)+F（-2）的值（2）若a=1,c=0,且绝对值f(x)≤1在区间（0,1】恒成立,试求b取值 (1/3)已知二次函数f(x)=ax2+bx+4,集合A={x|f(x)=x} (1)若A={1},求函数f(x)=的解析式 ( 设函数f(x)=ax2+bx+c (a>0)且f(1)=-a/2(1) 设x1 x2是函数f(x)的两个零点,求|x1-x2|的取值范围 (2)求证函数f(x)在区间(0,2)内至少有一个零点 爱的教育 读后感的结尾急急急急急急急急急 《爱的教育》读后感 结尾 关于公式η=G/nF的疑问现有一个滑轮组,一个定滑轮一个动滑轮,然后n=2a+1或n=2a（a为动滑轮的个数）.这时用这两个不同绕线方法来吊起同一重物,机械效率相同吗?如果说用η=G/nF来算就不同了,但 爱的教育读后感的结尾怎么写 《爱的教育》读后感结尾（最好自己写哈） 大家看看我的文章有没有错误好吗 Dear Staff,I’m writing with regret to tell you that Li Ming,a member of the software development department,has been diagnosed with cancer.Unfortunately,his illness is not covered by the medical insuran 帮我看一下这篇短文有没有错.急Helli, everyone! I am on duty today. Today is Monday. Today is December 21 th 2009. We are all here. I have a good friend, her name is Wang Min. We called her Lu Dan, because she has a round face. Her hair i 读书笔记与阅读笔记有什么区别? 阅读卡和读书笔记有什么区别?寒假老师布置的作业有阅读卡4篇,读书笔记6篇,请问这两个有什么区别吗? =阅读笔记和读书笔记有什么区别吗? 读书笔记与读书报告有区别吗 设函数f(x),x∈F,集合A={(x,y)|y=f(x),x∈F},B={(x,y)|x=1},问A∩B中所含元素的个数有几种可能,为什么? 函数y=f(x)(x∈D),若集合A={(x,y)ly=f(x),x∈D},B={(x,y)lx=a},则A交B中所含元素的个数有多少个最好有过程,详细一点的,我是高一的,解法不要太超纲,\(≥▽≤)/~ 改病句：脐带血虽然是个好东西 ,但全世界至今还没有一个用自己的脐带血干细胞治疗自身疾病的例子答案是虽然放在前面,那不是没主语了吗 帮忙看一下这篇作文有没有写的不对的地方~two days ago,my little dog jesse died.jesse had been in my family for almost four months,she was a very cute and smart dog,she had a big head and eyes of pure.jesse was labrador retriever,so s 帮忙看一下这篇英文短文有什么错误的地方Dear Rode, First,invite them more to take part in some meeting and activities,which can make their English a great progress and help them get away from solitude.And it also can help you know 帮我看一下这篇作文语法哪里有错误还有哪些地方可以修改一下的,My classmate WangLi,whose work was published on the school net,won the first prize in our school"s calligraphy competition.Some students hold the opinions that le 求第（1）（2）题答案