数学分析 英文数学问题

问一道英文数学题目(美国高中水平的)In a survey of 63 people,23 people subscribed to magazine A,21 people subscribed to magazine B,and 17 subscribed to magazine C.For any two of the magazaines,4 people subscribed to both magazines b_百度作业帮
问一道英文数学题目(美国高中水平的)In a survey of 63 people,23 people subscribed to magazine A,21 people subscribed to magazine B,and 17 subscribed to magazine C.For any two of the magazaines,4 people subscribed to both magazines b
问一道英文数学题目(美国高中水平的)In a survey of 63 people,23 people subscribed to magazine A,21 people subscribed to magazine B,and 17 subscribed to magazine C.For any two of the magazaines,4 people subscribed to both magazines but not to the thrid magazine.If 5 people in the survey did not subscribe to any of three magazines,how many people subscribed to all three magazines?怎么我一直做都是负数呢?
这道题很奇怪啊.条件1:For any two of the magazaines,4 people subscribed to both magazines but not to the thrid magazine,说明,有三组四个人的同时订了两个杂志,这个时候投票名额就用了24票.也就是说,12个人,24票.条件2:If 5 people in the survey did not subscribe to any of three magazines也就是说,5个人,0票.这个时候总共63个人,减掉就只剩下46个人.总共三组投票投了23+21+17=61票.减掉就剩下37票.最多一人投一个magazine,这时候还有9个人没有票投!好random.难怪是负的.
楼主要求的,可能是用英语答这道题。所以特别将一楼提供的解法转成英语,如下: Let X denote the number of poi and Y denote
5个人没订任何杂志,那么订杂志的总人数63-5=58被订的杂志总数32+21+17=70有四个人订了两份,那么这四个人订了4*2=8那么剩下58-4=54个人总共订了70-8=62份订三份杂志的人数设为x
则3x+54-x=62解得x=4要是读懂了,还是很简单的,中国高中要是出这种题估计老师都被骂死了···可是题目答案是9耶,我都怀疑...
第二行打错了,是23+21+17=61
按这个算下去
第四行换成61-8=53
3x+54-x=53
这么算来哥们你是对的···是负数···
23+21+17+5-4-2x=63
在调查的63人中,23人订阅杂志A,21人订阅杂志B,和17人订阅了杂志C,有4人订了其中任意两本杂志。如果在调查中有5人不订阅三种中任意一本杂志,有多少人订阅所有三种杂志?你题目错了吧?
peqpie是人的意思,63people就是63个人的意思。为了不让你失望,我再提供一个;'howmanypeople'是多少人的意思,那么这道题的答案就不可能是负数了。我是三年级的小学生,有英语老师,明天你等着吧!
英文水平有限,不是63-5=78么?而不是不是的,答案是9对的 ,我也跟你想法一样了哈哈。
圈子内有58个人啊,3个圈子重叠人才61。可是有4个人是属于两个圈子的,但又不属于3个圈子。 负的啊??
知道了 回我一下怎么搞得么。好像是题目给出错了。。。...
对的 ,我也跟你想法一样了哈哈。
圈子内有58个人啊,3个圈子重叠人才61。可是有4个人是属于两个圈子的,但又不属于3个圈子。 负的啊??
知道了 回我一下怎么搞得么。
好像是题目给出错了。。。模拟试题2016绵阳一诊各科考试试题
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图像处理中的数学问题(第2版)(英文版)
作者:(法)奥伯特
出版:世界图书出版公司
图像处理中的数学问题(第2版)(英文版)Introduction、The Image Society、What Is a Digital Image、About Partial Differential Equations(PDEs)、Detailed Plan、Mathematical Preliminaries、How to Read This Chapter、The Direct Method in the Calculus of Vgriations、Topologies on Banach Spaces、Convexity and Lower Semicontinuity、Rclaxation、Aboutr-Convergence、The Space of Functions of Bounded Variation、Basic Definitions on Measures、Definition ofBV(Ω)、Properties ofBV(Ω)、Convex Functions of Measures、Viscosity Solutions in PDEs等等。ForewordPreface to the Second EditionPreface to the First EditionGuide to the Main Mathematical Concepts andTheir ApplicationNotation and Symbols1 Introduction1.1 The Image Society1.2 What Is a Digital Image71.3 About Partial Differential Equations(PDEs)1.4 Detailed Plan2 Mathematical PreliminariesHow to Read This Chapter.2.1 The Direct Method in the Calculus of Vgriations2.1.1 Topologies on Banach Spaces2.1.2 Convexity and Lower Semicontinuity2.1.3 Rclaxat.ion2.1.4 About r-Convergence2.2 The Space of Functions of Bounded Variation2.2.1 Basic Definitions on Measures2.2.2 Definition ofBV(Ω)2.2.3 Properties ofBV(Ω)2.2.4 Convex Functions of Measures2.3 Viscosity Solutions in PDEs2.3.1 About the Eikonal Equation2.3.2 Definition of Viscosity Solutions2.3.3 About the Existence2.3.4 About the Uniqueness2.4 Elements of Differential Geometry:Curvature2.4.1 Parametrized Curves2.4.2 Curves aS Isolevel of a Function u2.4.3 Images aS Surfaces2.5 0ther Classical Results Used in This Book2.5.1 Inequalities2.5.2 Calculus Facts2.5.3 About Convolution and Smoothing2.5.4 Uniform Convergence2.5.5 Dominated Convergence了heorem2.5.6 Well-Posed Problems3 Image Restoration How to Read This Chapter3.1 Image Degradation3.2 The Energy Method3.2.1 An Inverse Problem3.2.2 Regularization of the Problem3.2.3 Existence and Uniqueness of a Solution for the Minimization Problem3.2.4 Toward the Numerical ApproximationThe Projection ApproachThe Half-Quadratic Minimization Approach3.2.5 Some Invariances and the Role of3.2.6 Some Remarks on the Nonconvex CaSe3.3 PDE-BaSed Methods3.3.1 Smoothing PDEsThe Heat EquationNonlinear DiRusionThe Alvarez-Guichard-Lions-MorelScale Space TheoryWeickerts ApproachSurface Based Approaches3.3.2 Smoothing-Enhancing PDEsThe Perona and Malik ModelRegutarization of the Perona and Malik Model:Catte et aL3.3.3 Enhancing PDEsThe Osher and Rudin Shock FiltersA Case Study:Construction of a Solution by the Method ofCharacteristicsComments on the Shock-Filter Equation3.3.4 NeighborbOOd Filters,Nonlocal Means Algorithm,and PDEsNeighborhood FiltersHow to Suppress the Staircase Effect?Nonlocal Means Filter(NL-Means)4 The Segmentation ProblemHow to Read This Chapter4.1 Definition and Objectives4.2 The Mumford and Shah Functional4.2.1 A Minimization Problem4.2.2 The Mathematical Framework for the Existence of a Solution4.2.3 Regularity of the Edge Set4.2.4 Approximations of the Mumford and Shah Functional4.2.5 Experimental Results4.3 Geodesic Active Contours and the Level.Set Method4.3.1 The Kass-Witkin-Terzopoulos model4.3.2 The Geodesic Active Contours Model4.3.3 The Level-Set Method4.3.4 The Reinitialization EquationCharaCterization of the Distance FunctionExistence and Uniqueness4.3.5 Experimental Results4.3.6 About Some Recent AdvancesGlobal Stopping CriterionToward More General Shape Representation5 Other Challenging AppliCationsHow to Read This Chapter5.1 Reinventing Some Image Parts by Inpainting5.1.1 IntroduCtion5.1.2 Variational ModelsThe Masnou and Morel ApproachThe Ballester et al.ApproachThe Chan and Shen Total Variation MinimizationApproach5.1.3 PDE-Based ApproachesThe Bertalmio et a1.ApproachThe Chan and Shen Curvature-Driven Diffusion Approach5.1.4 Discussion5.2 Decomposing an Image into Geometry and Texture5.2.1 Introduction5.2.2 A Space for Modeling Oscillating Patterns5.2.3 Meyer’S Model.5.2.4 An Algorithm to Solve Meyer’S ModelPrior Numerical C:ontributionThe Aujol et a1.ApproachStudy of the Asymptotic CaseBack to Meyers Model5.2.5 Experimental ResultsDenoising CapabilitiesDealing With Texture5.2.6 About Some Recent Advances5.3 Sequence Analysis5.3.1 Introduction5.3.2 The Optical Flow:An Apparent MotionThe Optical Flow Constraint(OFC)Solving the Aperture ProblemOverview of a Discontinuity.PreservingVariational ApproachAlternatives to the OFC5.3.3 Sequence SegmentationIntroductionA Vriational FormulationMathematical Study of the Time-Sampled EnergyExperiments5.3.4 Sequence RestorationPrinciples of Video InpaintingTotal Variation(tV)Minimization ApproachMotion Compensated(MC)Inpainting5.4 Image Classification5.4.1 Introduction5.4.2 A Level-Set Approach for Image Classification5.4.3 A Variational Model for Image Classification and Restoration5.5 Vector-Valued Images5.5.1 Introduction5.5.2 An FXtended Nbtion of GrudieutA Introduction to Finite Digerence MethodsB Experiment Yourself!ReferencesIndex
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