首页
登录
职称英语
For any numbers w and z, w·z=w3z(8-w2). If both z and w·z are positive numbers,
For any numbers w and z, w·z=w3z(8-w2). If both z and w·z are positive numbers,
游客
2025-02-27
19
管理
问题
For any numbers w and z, w·z=w3z(8-w2). If both z and w·z are positive numbers, which of the following could be a value of w?
选项
A、9
B、3
C、0
D、-2
E、-9
答案
E
解析
The most direct approach here is probably to plug in the answers and see which one gives a positive value for w·z. A and B are out because (8-w2) results in a negative number while w3z is positive, C is out because 0 is not a positive number, D is out because w3z is negative while (8-w2) is positive; only E meets the conditions, because both (8-w2) and w3z are negative, yielding a positive value for w·z.
转载请注明原文地址:http://tihaiku.com/zcyy/3974964.html
相关试题推荐
Whichofthefollowingcannotbethemedianoffivepositiveintegersa,b,c,d
Foranynumbersaandb,ab=ab(3-b).Ifaandabbothrepresentpositivenumbers
Ifx,y,andzarepositiveintegersandx2=y2+z2,whichofthefollowingmustb
Ifx,y,andzarepositiveintegers,and4x=5y=6z,thentheleastpossiblevalu
Forany3givennumbers,whichofthefollowingisalwaysequivalenttoaddingt
Whatisthegreatestpossiblecommondivisoroftwodifferentpositiveintegers
ListA,BandCmeansthelistofmultiplesofprimenumbers2,3,and5respect
Eachof5positivewholenumbersisatleast8.Theaverage(arithmeticmean)oft
IfintegersMandNarepositiveandhavethesamedigits,butinreverseorder,
Howmany3-digitnumbersbetween100and200haveadigitthatistheaverageof
随机试题
Questions29-40•Readtheintroductionbelowaboutacompanytrainingpro
ForgetHarryPotter.Nomatterthatthefilmaboutthisschoolboywithmagic
Thesebooksare(useful)______thanthoseforbeginnersofEnglish.moreusefulus
In1939twobrothers,MacandDickMcDonald,startedadrive-inrestaurantin
[originaltext]M:[5]Lookatalltheequipmenthere.Theymustbeusedforsome
警察要求司机停车,司机就必须将车开到路边停下,这种现象是()。A.从众 B.
Theprojectlife-cyclecanbedescribed
共用题干 甲房地产开发公司(以下简称甲公司)经过市场调研发现,某经济技术开发区
浅昏迷和深昏迷的主要区别为A、角膜反射及防御反射是否存在 B、对声、光刺激的反
下列指标中,不属于衡量宏观税负指标的是()。A.财政收入(一般预算收入)占G
最新回复
(
0
)