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∫1/(x^3+x) dx
请帮忙看看这个怎么求不定积分?
不定积分问题,帮忙解答一下
不定积分问题,帮忙解答一下,谢谢
no easy matter
人民出版社初中化学目录全目录
He___ to me as sonn as he arrives in shanghai请写出答案,再写出理由
He usually _____home before six after school.A.arrives at B.arrives in C.gets to D.arrives应该选择哪个,arrive in 是加大地点所以不能选择,可是get to 和arrive at 不是都是直接加地点吗,D选项又有什么样的用法,究竟
人们常用“操千曲而后晓声,观千剑而后识器”来说明实践很重要.请你用具体事例来说明这个观点.
对任意k∈[-1,1],函数f(x)=x^2+(4-k)x-2k+4的值恒大于零.对于任意k∈[-1,1],函数f(x)=x^2+(k-4)x-2k+4的值恒大于零,则x的取值范围是.f(x)=x^2+(k-4)x-2k+4的值恒大于零,则其Δ
Danny and I like walking______(on/in) the school garden_____(after/for) lunch.(二选一)
Complete the following dialogues1、Who_______________?Some of her classmates were with her2、I want to have an apple.Are there____________?No.There were some apples in the fridge yesterday.Are there any oranges?I am sorry.________________.We need t
Alice often arrives _____ her school at 7:30.A,in B,at C,to D,of
Complete the dialoguesA:what____ is it today?B:lt's the 1st of October.A:Oh.Lt's our _____ _____.
complete the dialogues急!今天下午要!1、-Who's that man?-lt's___sandy's math teacher .l'm not sure.2、-where is Tom?-sandy says he is still in bed.-how____he is.Let's go and wake him up.3、sandy:Mum,what's for dinner?l'm hungry.Mum:salad and
配平化学方程式的窍门我正在预习九年级的内容,不要太深
溶解与分解有什么区别?
溶解于分解有什么不同?是不是一样的?
easy day
求翻译 A moment with you 这首歌的歌词,要通顺,有感情的A moment with you 歌手:George Michael专辑:《Ladies & Gentlemen: The Best of George Michael》 歌词:(You can't keep holding it in when it's something good)Oh baby Hey, t
NO EASY DAY怎么样
请问经度60度纬度10度的的点在地球上共有A1个B2个C3个D4个
请问经度60度纬度过10度的点,在地球上共有A1个B2个C3个D4个
什么是元素种类
gold medal可不可数加s的话加哪?
什么是亲和力,怎么才能有亲和力?
牙克石哪里能买到做水火箭的胶塞或者牙克石七道街的化学用品商店在哪里
水火箭的胶塞在哪里买
江苏哪个城市最发达
已知函数f(x)=x^2+(2k-3)^x+k^2-7的零点为-1,-2.知k=2.求x属于[-2,2],求f(x)的最大最小值
following statements are written in English1.The normal force and the gravitational force are not an action-reaction pair.2.For an object traveling in circular motion ,the centripetal force never doeswork【向心力不做功?是这个意思吗?为
水火箭的橡皮塞哪里有