首页
登录
职称英语
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18
游客
2025-02-24
13
管理
问题
On a certain number line, if -7 is a distance 4 from n and 7 is a distance of 18 from n then n =?
选项
A、25
B、11
C、3
D、-3
E、-11
答案
E
解析
在某一数轴(number line)上,假如-7与n的距离是4,且7与n的距离是18,问n等于多少?
解:本题的正确答案是(E)。涉及数轴上的两个数距离问题,要用到绝对值的概念。由题义可得:根据第一个条件,n=-11或-3;根据第二个条件,n=-11或25;所以n=-11。考生在解答此类题目时,一定要注意下面这句话的确切含义:
(1)7 is a distance of 4 from n.
(2)7 is the distance of 4 from n.
上面第一句话用了不定冠词,应理解为7与n之间的距离是4;第二句话用了定冠词,应理解为7是4和n之间的距离。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3970850.html
相关试题推荐
Solveforyifthedistancebetweenthetwopoints(2,8)and(-6,y)is17.Use
Ifthecostofalong-distancephonecallisccentsforthefirstminuteand2/
72-32=Bothnumbersareraisedtothepowerof2(theyaresquared).Youmustf
xandyarepositivenumbers.ColumnAColumnB[img]ct_2im
ThelargeroftwonumbersexceedstwicethesmallernumberbyThesumoftwicet
Solveforyifthedistancebetweenthetwopoints(2,8)and(-6,y)is17.23Usethe
Whatisthedistancebetweenthepoints(3,-4)and(9,4)?10UsetheDistanceFormula
3x-17=4Solveforx.21Tosolvethisproblem,firstisolatetheunknownnumber
Onthenumberline,2.3ishalfwaybetweenwhichofthefollowingnumbers?______
Acertainbrownierecipestatesthatthebrowniesshouldbebakedinarectangul
随机试题
Maryisbynomeanslearned;norisshegoodatanypracticaltrade.Theonlyas
WhenItComestoWater,WeareAllMayaNowIt’spossibleth
______tennishasbeenplayedforcenturies,themoderngameoriginatedinEnglan
Historically,humansgetseriousaboutavoidingdisastersonlyafteronehas
Itisimportantthatscientistsbeseenasnormalpeopleaskingandanswerin
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
Hewasclosetosuccess.A:near B:tigh
1.断路器操作失灵的处理原则中,对于(),应检查直流母线电压是否达到规定值
A. B. C. D.
A.τa>τb B.τa<τb C.τa=τb D.无法比较
最新回复
(
0
)