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求函数零点求下列函数的零点：一.y=2x+3 二.y=X^2-4x 三.证明：函数y=x^2+6x+4有两个不同的零点 求函数的零点 函数的零点 首字母填空 She likes singing and running b()那个单词是b开头的 my favourite sport is running.划线部分提问 （running划线) 2 、she likes tennis best 变为同一句3、he can sing the song .变为一般疑问句 4、I can sing the song 变为一般疑问句.5、can Lily wtite chinese?做肯定回答 6、 1.Lily likes running in the morning,but she doesn't like to run this morning.2.How many students in your class often take a bus to school?Only one goes to school by bus.3.Don't shout in class.Listen to the teacher carefully.4.He is good,Let him help 必修五余弦定理 确定三角形ABC的形状在△ABC中,已知（a+b+c）（a+b-c）=3ab,且2cosA·sinB=sinC,确定△ABC的形状.thanks】 Betty's best friends likes to do the same thing as she does.改同义句Betty and her best friends have something_____ ______. 三角形ABC的三边分别为a,b,c,边BC上的中线记为m,用于弦定理证明,m=1/2根号2（b^2+c^2)-a^2急、拜托叻、、嘻嘻 she likes fruit and___,oranges.after allabove allin allat all请您分析一下这个句子的意思以及对上述四个进行辨析.翻译：A visit to such schools will leave you in no doubt that the children enjoy themselves. a的平方减5a加6 还有它的提取公英式相应的定理 3q 一a的2次方+5a减6=一(a的2次方减5a减6)对吗?这样添加括号 已知函数f（x+1）=x²-3x+2,则f（x）=? 翻译：He only likes collecting sports things he likes running 和 he likes run那个对?英语考试我写了he likes running.可是上面却打了一个大红x.到底哪个对? He likes to wear a red T-shirt.Ben likes blue best.翻译 lim(x→∞)[(X^2+2x+5)/(3x^2-x+1) = 3a+a=4a 是不是方程?是不是一元一次方程?3（a+1)=3a+3呢 怎么解这个a+2a^2+3a^3+4a^4+.+na^n方程啊 直角三角形射影定理是几年级学的 Jack likes to eat chicken very much改成疑问句 My mum likes swimming very much.改为一般疑问句并做肯定和否定回答. 一道初三的一元二次方程.x^2-4ax+3a^2=1-2a承 求多项式2x的2次幂+3x-2分之1与4x的2次幂-4x+2的差 改为现在进行时She often runs behind her lovely dog对a lovely rabbit提问 现在进行时的关键词有哪些 如often She relaxed her mind by listening to music.这句话可以加上often 如果变成现在进行时该怎么样变? 因式分解a的平方+5a+ba的平方+5a+b2x的平方-x-36x的平方+7x-5 因式分解5a的平方加a加一 已知：f(x)=㏒3 (x^2+ax+b)/x,x属于（0,＋∞）.是否存在实数a,b,使f（x）同时满足下列两个条件：（1）f（x）在（0,1）上是减函数,[1,＋∞）上是增函数；（2）f（x）的最小值是3,若存在求出a b,若不 已知函数f（x）=x^3-ax-1是否存在实数a使f（x）在（-1,1）上单调递减 已知f（x）=log3 x2+ax+b x ,x∈（0,+∞）,是否存在实数a、b,使f（x）同时满足下列两个条件：（1）f（x）在（0,1）上是减函数,在[1,+∞）上是增函数；（2）f（x）的最小值是1,若存在,求出a、b,若不