电大微积分基础作业

it's been six years这句话什么时态 been 的作用与时态 It has been 3 years since he came here. 150 years ago,when Western countries came to East Asia to colonize it,it was only Japan150 years ago,when Western countries came to East Asia to colonize it,it was only Japan which could confronted them.it was only Japan which could confronted them. It has been ten years now since the Labour Party came to______.A.power B.control C.force D.charge请说明理由 He__China for several years.A has been to B has come to C has been in D came to 求函数y=(3x-x^2)/(x^2-1)+1/(1-x)-2的零点 函数y=x^2-3x+1的零点个数 求函数y=(3x^2-x^2)/(x^2-1)+1/(1-x)-2的零点 函数y=2∧x+3x的零点所在的一个区间是 试找出一个长度为一的区间,在这个区间上函数Y=(x-1)\(3x+2)至少有一个零点 已知f(x)是R上的奇函数,x>0时,f(x)=-x2+2x+3,（1）求f(x）的解析式（2）画f(x)的图像,指出单调区间 帮我做11、12题 11,12题这么做 11 题 12题怎么做 已知函数f（x）=|x2-2x-3|的图像与直线y=a又且仅有3个交点,求a的值 要详解 get I at up in six the thirty morning连词成句 They often get up at six thirty in the morning.(同义句)They often get up at ______ ______ _____ six in the morning. at morning got Jim up six thirty this .(组成句子) 画出函数f(x)=2x-3/x-1的图像 he usually gets up at six thirty in the mornin.[用YESTERDAY MORNING改写句子 He gets home at 5:00 ,中的home 是什么成分?home 是个副词啊,那它是什么成分呢? he gets home _at ____five____ in the afternoon 对划线提问 He gets home at five in the afternoon 提问 what he get home in the afternoon 11. 已知|x|＝4,|y|＝2分之1,且xy小于0,求xy的值 ＿＿weekdays,she usually gets up at 6：45 in the morning．＿＿weekdays,she　　 usually 　　gets　　 up 　　at 6：45 in 　　the　　 morning．（说明理由）A．in　　B．at　　C．on　　D．with 请看下面的补充说明1+2 3 1+2² 2+2² 5 6 1+2³ 2+2³ 2²+2³ 9 10 12 请问第2009个数是多少,在第几行的第几个数? Jane usually gets up at six thirty in the morning.She takes the shower ()twenty to seven.Then she () breakfast at seven and after that she goes to school.She has () at twelve o’clock .She likes rice and vegetables () lunch.She thinks they are healt 看下面的问题：补充说明古代有句名言,是说坏事小不能去做,___________,干多变成大坏事;好事虽小,也不能因为它小就不做,——————,再大的好事都是从点滴开始的.第一空是——————— She usually gets up ( ) five in the morning.括号里填介词 求解完形填空Alice lives in the beautiful countryside.She usually gets up early in the morning.Alice lives in the beautiful countryside.She usually gets up early in the morning.She is never late 31 school.After getting up,she often showers and t 小丽在学习了"除零以外的任何数的零次幂的值为1"后,遇到这样一道题:"如果(a+1)^a-2=1,求a的值.她解出来的结果为a=2,老师说她考虑的问题不够全面,