首页
登录
职称英语
For any numbers a and b, ab=ab(3-b). If a and ab both represent positive numbers
For any numbers a and b, ab=ab(3-b). If a and ab both represent positive numbers
游客
2025-02-27
20
管理
问题
For any numbers a and b, ab=ab(3-b). If a and ab both represent positive numbers, which of the following could be a value of b?
选项
A、-5
B、-2
C、2
D、4
E、7
答案
C
解析
The most direct approach to this sort of problem is to plug in the answers and see which one works. Choices A and B are out because any negative value for b would result in a negative value for ab if a is positive. C works because it gives the result ab=2a, which has to be positive. D and E do not work because they result in negative values for ab. Therefore, C is the only answer that provides a possible value for b.
转载请注明原文地址:https://tihaiku.com/zcyy/3974931.html
相关试题推荐
Ifx,y,andzarepositiveintegersandx2=y2+z2,whichofthefollowingmustb
If△and[img]2011q3/ct_egmatqm_egmatqchoose_0378_201121[/img]representsingle
Forany3givennumbers,whichofthefollowingisalwaysequivalenttoaddingt
Thefigureaboverepresentsawindow,withtheshadedregionsrepresentingopeni
Inanefforttoplanoutexpenses,theRobertsfamilyisrepresentingitsannual
Whatisthegreatestpossiblecommondivisoroftwodifferentpositiveintegers
ListA,BandCmeansthelistofmultiplesofprimenumbers2,3,and5respect
Sixdifferentnumbersaretobeselectedfromthe(0,1,2,3,4,5,6)tocompos
Howmany3-digitnumbersbetween100and200haveadigitthatistheaverageof
Howmanyofthepositivedivisorsof960arealsomultiplesof6?A、7B、6C、8D、1
随机试题
IcedrawstheDutchoutdoorswithaforceasoldastheirhistory,whichmeans_
Theconceptofmanversusmachineisatleastasoldastheindustrialrevol
TheFrugalGourmetCooksAmericanbyJeffSmithOurr
Thankstothedevelopmentofscienceandtechnology,weembracenewthingsa
脊髓栓系综合征多见于新生儿和儿童,女性多于男性。下列临床表现中,可不考虑本病的是
王老师在教学中将书本上学生陌生的案例改为学生身边的案例,这不属于()。A.对教材
预制构件进场时应对其主要受力钢筋数量、规格、间距、保护层厚度及混凝土强度等进行实
蛇串疮调护
下列关于“快捷方式”的说法中,错误的是( )。A.“快捷方式”是打开程序的捷径
对于有抗冻要求的素混凝土方块养护要求,包含()等。A.混凝土浇筑完后及时覆盖,
最新回复
(
0
)