提问三道数学题1.S is a set of n consecutive integers.比较the mean of S与the median of S大小 答案是一样大我知道Mean=(a1+an)/2,当n=2k时,median=(ak+ak+1)/2；当n=2k+1时,median=ak+1,问题是怎么比较出mean和median想等的?

提问三道数学题1.S is a set of n consecutive integers.比较the mean of S与the median of S大小 答案是一样大我知道Mean=(a1+an)/2,当n=2k时,median=(ak+ak+1)/2；当n=2k+1时,median=ak+1,问题是怎么比较出mean和median想等的? 几道数学题,不需要翻译只需要过程,着急,感激涕零,不知所云.1.Let S be a set of real numbers that satisfy the following conditions:0 is in S; Whenever x is in S then 2^x+3^x is in S; whenever x^2+x^3 is in S then x is in S.Prove: A set of keys is here划线提问A set of keys划线提问 Kitty's father is a( policman)三种提问法? 几道英文数学题麻烦给出中文翻译和解答!1.If 4 less than 3 times a certain number is 2 more than the number,what is the number?2.Set X has x members and set Y has y members.Set Z consists of all members that are in either set X or set A:Is that a ______TV set?B:No,it isn't .It 's a color set. This is s book.(a book提问) Is's a clock.该怎么提问? uncle wang is mending the TV set (with a knife)括号里面提问 a set of keys is on the sofa.(on the sofa部分提问）__a set of keys?my keys are on the desk.(on thedesk部分提问) 三道英语句型转换1.My uncle is a teacher.My aunt is a teacher,too.（合为一句）2.I want the new fridge.（new划线提问）3.It's a quarter past three.（a quarter past three划线提问） A set of （） is in Lily's bag.A.keys B.ringA set of （） is in Lily's bag.A.keysB.ringC.bookD.pen 英语句子（划线提问,一般疑问句,否定句之类的12道）1.The yellow coat is Mum’s.(划线提问)2.There’s a ball in the box.(划线提问)3.There’s a dog in the car.(一般疑问句)4.It’s Sandy’s schoolbag.(划线提问)5.Th 一个英语句法问题 a set of keys 应该用is还是are提问 那a pair of shoes呢 求解两道SAT数学题!1. Which of the following is an element of both the set of positive odd integers and the set of prime numbers?A. 2B. 5C. 9D. 12E. 21 答案选B.为神马?! 2.For 12 bottles of shampoo of various brands , the cost an volume o 数学题和英语题,急1.This is a good book.改为一般疑问句2.It's a pencil in English.对pencil提问---____ ____it in English?3.That is a bus.改为复数句4.Are these apples?改为单数句5.Those are bags.对bags提问-----______ ______t Bob's father is a worker.(对a worker提问) 改变句型：1.It’s a circle.（划线提问） 2.A circle is like a ball.(划线提问) 3.It’s a sunny d改变句型：1.It’s a circle.（划线提问）2.A circle is like a ball.(划线提问)3.It’s a sunny day.（划线提问,两种表