Which of the following is equal tofor all integers x and y?

admin2017-10-16 36

问题 Which of the following is equal to

for all integers x and y?

选项 A、4^-x
B、4^-y
C、2^xy
D、4^x
E、4^y

答案B

解析 Simplifying the fraction

. The only answer choice with 2 as the base is Choice C, 2^xy, which is clearly not the correct answer. Since all the other answer choices have 4 as the base, it is a good idea to rewrite 2^-2y as an expression with 4 as the base, as follows.

Thus the correct answer is Choice B.
This explanation uses the following strategies.
Strategy 5: Simplify an Arithmetic or Algebraic Representation
Strategy 8: Search for a Mathematical Relationship

转载请注明原文地址:https://kaotiyun.com/show/rrkO777K

本试题收录于： GRE QUANTITATIVE题库GRE分类

GRE QUANTITATIVE

GRE

相关试题推荐

WhenIwasyoung,Ispentmysummervacationsonmygrandparents’farm.ThesummerthatIgraduatedfromcollege,I【C1】______my
Oneofthebestpiecesofmedicalnewstoemergeoverthelastseveralyearsisthatchocolatemay【C1】______youlivelonger,pro
BythetimeIfinishedhighschool,myinterestinanimalshadgrown,andenrolledatauniversitytostudybiology.Ilearneds
WehavequiteabitofinformationaboutancientEgyptianmedicine．Doctors’instructionshavebeenfoundtotellus【56】theydid
WehavequiteabitofinformationaboutancientEgyptianmedicine．Doctors’instructionshavebeenfoundtotellus【56】theydid
Ourpreferencesforcertaincolorsare______accordingtothepassage.Whichofthefollowingcouldbethemostsuitabletitle
TheAmericansgotothemoviesmainlybecausetheywant______.Whichofthefollowingispeople’snormalresponsetothemovie
Thenumberofprimaryschoolsintheruralareas______doublinginthepast50years.
Whichofthefollowingisequaltothecubeofanon-integer?
Whichofthefollowingcannotbethemedianoffivepositiveintegersa,b,c,d,ande?

随机试题

男性，60岁。无痛性血尿半年余。膀胱镜检查，膀胱三角区可见一乳头状肿物，有蒂。活检报告为乳头状瘤。符合此诊断的病变是
A．缺铁性贫血B．巨幼细胞性贫血C．慢性病性贫血D．再生障碍性贫血E．海洋性贫血成人实验室检查：HGB78g／L，白细胞、血小板正常，血清铁25μmol／L，血清铁蛋白200μg／L，血清总铁结合力60μmol／L，HGBA25．0％，网织
生物膜(单位膜)的组成包括()。
诊断活动和评价活动是()的分析过程。
在台风威胁中，以下做法正确的为()。
2007年8月北京某出口加工区某进出口企业从美国进口一批货物。货物于2007年8月20日从纽约启运，9月18日货物抵达天津港，次日通过铁路运抵北京．本批货物进口具有全程提运单。海关发现该企业所运货物中有一批禁止进出境货物。根据以上所述，在下列选项
根据个人所得税法律制度的规定，下列各项中，按照“工资、薪金所得”项目征收个人所得税的是()。
下列各项关于会计估计变更的说法中，正确的是()。
①因此，必须广泛宣传生态平衡知识②如捕捉青蛙喂鸭使虫灾日益严重③破坏它，实际上是危及人类自身④生态平衡是人类生存的重要条件⑤滥伐森林使野生动物日益减少，造成水土流失等⑥以求人与自然和谐地相处将以上6个句子重新排列，语序正确的是：
A、Hewasinjuredinafightandhadtoleavethegame.B、Hefoughtwithanotherplayer.C、Hegotinafightwithafanandwast

最新回复(0)

Which of the following is equal tofor all integers x and y?

GRE QUANTITATIVE

GRE

WhenIwasyoung,Ispentmysummervacationsonmygrandparents’farm.ThesummerthatIgraduatedfromcollege,I【C1】______my

Oneofthebestpiecesofmedicalnewstoemergeoverthelastseveralyearsisthatchocolatemay【C1】______youlivelonger,pro

BythetimeIfinishedhighschool,myinterestinanimalshadgrown,andenrolledatauniversitytostudybiology.Ilearneds

WehavequiteabitofinformationaboutancientEgyptianmedicine．Doctors’instructionshavebeenfoundtotellus【56】theydid

WehavequiteabitofinformationaboutancientEgyptianmedicine．Doctors’instructionshavebeenfoundtotellus【56】theydid

Ourpreferencesforcertaincolorsare______accordingtothepassage.Whichofthefollowingcouldbethemostsuitabletitle

TheAmericansgotothemoviesmainlybecausetheywant______.Whichofthefollowingispeople’snormalresponsetothemovie

Thenumberofprimaryschoolsintheruralareas______doublinginthepast50years.

Whichofthefollowingisequaltothecubeofanon-integer?

Whichofthefollowingcannotbethemedianoffivepositiveintegersa,b,c,d,ande?

男性，60岁。无痛性血尿半年余。膀胱镜检查，膀胱三角区可见一乳头状肿物，有蒂。活检报告为乳头状瘤。符合此诊断的病变是

A．缺铁性贫血B．巨幼细胞性贫血C．慢性病性贫血D．再生障碍性贫血E．海洋性贫血成人实验室检查：HGB78g／L，白细胞、血小板正常，血清铁25μmol／L，血清铁蛋白200μg／L，血清总铁结合力60μmol／L，HGBA25．0％，网织

生物膜(单位膜)的组成包括()。

诊断活动和评价活动是()的分析过程。

在台风威胁中，以下做法正确的为()。

根据个人所得税法律制度的规定，下列各项中，按照“工资、薪金所得”项目征收个人所得税的是()。

下列各项关于会计估计变更的说法中，正确的是()。

A、Hewasinjuredinafightandhadtoleavethegame.B、Hefoughtwithanotherplayer.C、Hegotinafightwithafanandwast