60比30多百分之几

什么的平方等于34 急死了我是八年级的、什么正负根号吖.?? 30的平方加多少的平方等于34的平方 设函数f(x)=ax^2+lnx求f(x)的单调区间设函数f(x)=ax^2+lnx（2）设函数g（x）=（2a+1）x，若x属于（1，+无限）时，f（x)恒成立 求a的取值范围 以知a的2n+1次方＝2分之1,则8a的6n+3次方－1值要过程 At weekends,I usually ___ for half an hour in the morningA go run B go to running C go running D running 在三角形ABC中S=a^2-(b-c)^2求sinA 在三角形ABC中,已知a=2,b=3,c=120°,则sinA的值为 求详解,急 几道概率论的问题1、设F（x）=0,x0,则（A）P（B|A）>0（B）P（A|B）=P（A）（C）P（A|B）=0（D）P（AB）=P（A）P（B）3、设X~N（0,1）,N（1,1）,且X与Y相互独立,则下列正确的是（A）P{X+Y 1、分子：a平方—4a平方 分母：—4a+42、分子：x平方—2xy+y平方 分母：y—x 8x平方（x—y）三次方/6x（y—x）平方 化简题.化简,(a^-3b^4)^2乘(3a^2b)^-2.(x+y)乘x^2/x^2-y^2+y^2/y-x.y-3/4y-8除(y+2-5/y-2).解分式方程,2/2-x+x^2-1/x^2-4+1/x+2＝1. 把过程写下来 she walks in the garden f_______ about half an hou填一个f开头的词,符合句意.抱歉 最后是hour She walks in the garden for about 30 minutes(改为同义句并且对划线提问）划的是for about 30 minutesShe walks in the garden for about 30 minutes(改为同义句）She walks in the garden for about —— —— —— A:Where is Lily?B:She ____ for about half an hour.A.has leftB.has goneC.has been awayD.went She goes running for half an hour every morning .(意思一样）It takes _____ half an hour to _____running every morning Kitty and Alice are asking Winnie about where she has been in Garden City.(中文翻译） Mr.Green e___ in the garden foe half an hour every day. 已知函数f(x)4的x次方/(4的x次方) +2求f(2008分之1)+g(2008分之2)+f(2008分之3)+…+f(2008分之2007)的值 已知|a-1|+(ab-2)的2次方=0求x/ab+x/(a+1)(b+1)+...+x/(a+2007)(b+2007)=2008的值 a half hour later\after half an hour\after half an hour later\half an hour later分别是什么意思? 若关于x的一元二次方程x^2-x+k=0(k为常数)有两个相等实数根,则k=____ 如果关于x的一元二次方程x²-x+k=0(k为常数)有两个相等的实数根,那么k__ （ ）It took him half an hour to walk ＿＿＿ the（ ）It took him half an hour to walk ＿＿＿ the forest.A.across B.over C.cross D.through It took them half an hour by bus.(改为同义句) The—— ——took them half an hour. it took them harf an hour by bus.(改为同义句) the _ _ took them half an hour. it took him half an hour to walk____the forest.A.crossB.overC.croosD.through 已知a满足|2007-a|+跟号a-2008=a,那么a-2007^2的值为 The child with his teacher often ____(run)for half an hour in the morning.填动词形态. These children often____their teacherA:play an important role inB:keep a check onC:play a trick on D:keep track of 选哪个?为什么?（我现在正在初学英语, The children often help____(帮助） in their study. the ___ (child) are talking to their teacher.