学生家庭作业调查报告

等比数列an中,a3+a7=20,a1×a9=64 求a11 已知{an}为等比数例,且a1×a9=64,a3+a7=20,求a11 在等比数列{an}中,a1+a3=5,a4+a6=10,则a7+a9=_____ But he doesn’t always ( )what we want.A.ask us b.tell us to c.speak us d.say to us talk,speak,tell,say的意义、用法、区别 He doesn't want to talk with me______the phone.AHe doesn't want to talk with me______the phone.A.in B.on C.with D.from say talk tell和speak的区别 已知等比数列an的公比为正数,且a3*a9=2a5^2,a2=1,则a1= 等差数列{an}中,a1=-5,a4=1/2,若在该数列的每相邻两项间插入一个数,使之仍成等差数列,求新等差数列的一a4是1/2 没有负号；a1是负5,有负号 在等差数列｛An｝中a1=-5,a4=1／2.若在该数列的每相邻两项中插入一个数,使之乃成等差数列,求新的等差数列的的一个通项公式 用talk to, talk with, talk about, talk of,造句 talk about和talk to,talk with区别 talk with talk about talk to 之间的细微区别talk with talk about talk to 之间的细微区别要求详解最好举适当之例子 We need friends to ____,or we'll feel lonely.A chat B chat with C speak D talk谁若知道就告诉我, 等差数列{An}的公差d≠0,且.A1,A3,A9成等比.求：A1+A3+A9比A2+A4+A10的值. 写一段话,要用5个以上的动词. talk with talk to speak to它们的区别 The boy likes to talk with people.talk可以换成哪个单词?say?speak?tell?talking? My friend is angry with me .What should i ___ to him?A.say B.tell C.speak D.talk 用四个动词写一段话. 量的组词 量怎么组词 Din't talk with others during the class的同义句如题You ----- ------ with others during the class you'd better not talk with others in class again回答是什么 He kept talking with others in class.（保持原意）He ＿ ＿ talking with others in class. he decided_______(not talk)with others in class to improve his grades Don't f( ) with others in class ,or our teacher is very angry 根据材料二并结合所学知识,说明抗日战争为什么成为中华民族复兴的重要枢纽 新中国成立的标志是什么,新中国的成立在中华民族复兴道路上有何历史意义 抗日战争结束的标志是什么? 新民主主义革命结束标志是抗日战争的胜利 Hi! I am interested in learning more about the opportunities with your company.Please review my comp card (in this email) and review my online portfolio with the link provided. I look forward to hearing from you.