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?

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 09:44:35
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?
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?（n,k,k+1均为a的角标）
2.If 9 trees are originally planted in a
circular pattern(就是9个点围成一个圆圈),what is the least number of trees that
must be transplanted so that the 9 trees will be in 2 straight rows?
咋做?答案是9-2*2=5,这是啥意思?（此题的图无法上传,若实在不明题意,就不必回答）
3.A rectangular rug covers half of a
rectangular floor that is 9 feet wide and 12 feet long.If the dimensions of the
rug are in the same ratio as those of the floor,how many feet long is the rug?答案是6根号下2
请问既然rug盖住floor一半,为何不能认为其长或宽是floor的一半?而是非要通过面积一半来算?

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?
1假设有K个连续整数,当K为偶数 时,其平均值为（1+K）/2,中位数为[K/2+(K/2+1)]/2=(1+K)/2
当K为奇数时,平均值为(1+K)/2,中位数为（K+1）/2所以两者相等.
2看不明白.
3题目是说毯子和地板是长宽等比例的,所以毯子的长为地板长度除以根号2等于6根号2.

是英语还是数学？

能翻译一下么。。。。

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