首页
登录
职称英语
If N =[img]2022m10x/ct_ve01204002j_0011_221018[/img], where T =K/5 and x = 5 -
If N =[img]2022m10x/ct_ve01204002j_0011_221018[/img], where T =K/5 and x = 5 -
游客
2024-01-13
64
管理
问题
If N =
, where T =K/5 and x = 5 - T, which of the following expresses y in terms of N and T?
选项
A、
B、
C、
D、
E、
答案
A
解析
To eliminate K and x in the first equation (the only equation in which y appears), use the second and third equations to replace K and x with expressions involving only N and T. Then solve for y in terms of N and T.
Alternatively, the algebraic manipulations involved in solving this type of problem as above can often be replaced with numerical computations by assigning values to the variables. The assigned values need to be consistent with all the constraints in the problem, and, for efficiency, the assigned values should be chosen to minimize the numerical computations. Letting K= 10, it follows from T=k/5 and x = 5-T that T= 2 and x = 3. Using these numerical values, the question can be rephrased as follows.
If
,then which of the following expresses y in terms of TV?
Letting y = 1, it follows that N=
= 2.
Plugging N= 2 into A, B, C, D, and E above gives, respectively, 1,-1, 1/2, -5/3, and 6/5.
The correct answer is A.
转载请注明原文地址:https://tihaiku.com/zcyy/3360161.html
相关试题推荐
Ifa◇bisdefinedas[img]2022m10x/ct_ve01203002m_egmatqchoose_0011_221020[/im
[img]2022m10x/ct_ve01204002j_0045_221018[/img]Thetableaboveshowsthecarren
Ifn>4,whatisthevalueoftheintegern?[img]2022m10x/ct_ve01204002j_0284_
Ifd=[img]2022m10x/ct_ve01204002j_0015_221018[/img],a=c/2,andb=3c/4,whatist
[img]2022m10x/ct_ve01204002j_0014_221018[/img]Thefigureaboverepresentsanet
IntheformulaW=[img]2022m10x/ct_ve01204002j_0013_221018[/img],integersPandt
IfN=[img]2022m10x/ct_ve01204002j_0011_221018[/img],whereT=K/5andx=5-
[img]2022m10x/ct_ve01204002j_0007_221018[/img]Thetableaboveshowstheaverag
[img]2022m10x/ct_ve01204002j_0006_221018[/img]Patwillwalkfromintersection
[img]2022m10x/ct_ve01204002j_0001_221018[/img]Themapaboveshowsthetrailst
随机试题
VisualPerspectivePerspectiveinartisthewaythatartistsrepresentthree-di
由于这些原因,在过去四十年间人们对这一课题进行了大量的理论研究工作。(havebeendone)Forthesereasonsagreatdeal
A. B. C. D.
结构化布线设计中,规定信息插座的安装位置的子系统是()。A.工作区子系统
某碳化深度测点的3次实测值分别为1.75mm、1.75mm和1.25mm,则该测
2021年4月,我国本外币贷款余额187.85万亿元,同比增长12%;人民币贷款
关于军休干部的需要,下列说法错误的是( )。A.具有鲜明的政治倾向性和特殊的荣
能力类型的差异是指( )上的差异A.天赋条件(如聪明、一般和迟钝) B.男女
心室肌细胞动作电位3期复极化A.因Na+内流而产生 B.因Ca2+内流而产生
社区获得性肺炎病原体排在首位的是A:金黄色葡萄球菌 B:肺炎克雷伯杆菌 C:
最新回复
(
0
)