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1.
笔者曾经在一本杂志上看到这样一个问题:甲乙两人进行射击游戏,规则如下:若一方射击一次击中目标,则此人继续下一次射击;若一方射击一次未击中目标,则由对方接替下一次射击.已知甲乙两人射击一次击中目标的概率都是31,且每次射击是否击中目标彼  相似文献   

2.
一天,在森林里,一只大肥猪和一只小瘦猪遇到了一只大灰狼……你觉得这个故事怎么接下去比较合理呢?  相似文献   

3.
《数学大王》2011,(9):37-37
一天,在森林里,一只大肥猪和一只小瘦猪遇到了一只大灰狼……你觉得这个故事怎么接下去比较合理呢?  相似文献   

4.
为了让学生摆脱题海战术,真正实现减负提质增效的目标,本文中将基于解一题、会一类、通一片的深度学习理念,结合具体案例介绍从一题多变、一题多问、一题多解三个方面构建“一题一课”复习模式的过程.  相似文献   

5.
笔者曾经在一本杂志上看到这样一个问题:甲乙两人进行射击游戏,规则如下:若一方射击一次击中目标,则此人继续下一次射击;若一方射击一次未击中目标,则由对方接替下一次射击.已知甲乙两人射击一次击中目标的概率都是1/3,且每次射击是否击中目标彼此相互独立,甲进行第1次射击,试推断甲乙两人谁在第3次射击的可能性较大.  相似文献   

6.
一、《奇异的国度》中的重伤员问题《奇异的国度》是英国著名作家路易斯·卡洛尔的代表作,在这部童话著作里记述了这样一道奇异的算题:"在一次激战中,有100名士兵参战.战后,他们之中有40名士兵失去了一只眼;50名士兵失去了一只手;65名士兵失去了一只脚.其中有15名士兵既失去一只眼,又失去一只手;有20名士兵既失去一只眼,又失去一只脚;有25名士兵既失去一只手,又失去一只脚.需要说明的是,所有参战士兵全部受伤,这些伤员中没有失去双眼、双手或双脚的伤兵,毫无疑问,同时失去一只眼、一只手和一只脚的士兵受伤最重,现在请你推断一下这样的重伤士兵共有多少人?"  相似文献   

7.
神奇之旅     
顾东春 《数学大王》2010,(7):22-25,33
暑假到了。一天上午.五年级的王丹丹来到田野里,和小伙伴们一起玩耍。忽然,天空中响起一声凄厉的雕鸣,丹丹抬头一看,只见一只庞大无比的雄雕从天而降,一双金钩般的爪子直向她抓来。  相似文献   

8.
巧算塔中灯     
陈红 《数学大王》2009,(1):20-20
一天,唐僧师徒四人来到一座高大的宝塔前。抬头一看,只见那宝塔红墙绿瓦,雕梁画栋,香烟缭绕,十分惹人喜爱。师徒四人商议当晚就在塔旁小庙住宿。夜幕降临,七层宝塔层层灯火通明,而且一层比一层明亮。四人非常惊奇,唐僧命八戒去数一数塔内各层灯的数目。  相似文献   

9.
笔者所在的学校是一所省级四星高级中学.近年来在高考前两个月复习中为了促进教师不断成长,提高学生的思维能力和数学素养,拓宽学生探求较难问题的思路,学校开展了一题一议一思探究型课堂教学活动,笔者作为此课型的主持人,经过不断地实践与总结反思,收获颇丰.所谓一题一议一思探究课.即从三个层次入手.首先是精选有代表性的典型例题,此为一题;其次是在课堂上教师引导学生从基础知识和基本方法出发,让学生动手动脑探求此题、此类问题的解决  相似文献   

10.
中考对于每一位即将毕业的初中生来说,都是一次非常重要而又关键的考试.而对于每一位教师来说,也是一次非常难得的检测教学成绩和评价教学水平的机会.因此备受每一位老师和学生的关注.每一位教师都想尽一切办法来提高学生的成绩,使出所有的招数来指导学生的复习工作,并想尽一切办法来提  相似文献   

11.
In this paper, we prove a theorem on the growth of a solution of a linear differential equation. From this we obtain some uniqueness theorems concerning that a nonconstant entire function and its derivatives sharing a small entire function. The results in this paper improve many known results. Some examples are provided to show that the results in this paper are the best possible.  相似文献   

12.
In this paper, we study the growth of solutions of a first-order linear differential equation and that of a second-order linear differential equation. From this we obtain some uniqueness theorems of a nonconstant entire function and its first derivative having the same fixed points with the same multiplicities. The results in this paper also improve some known results. Some examples show that the results in this paper are best possible.  相似文献   

13.
14.
In this paper we prove the existence of a solution to the scalar equilibrium problem in generalized convex space. As applications, we derive results on the best approximations and simultaneous approximations. The results of this paper generalize some known results in the literature.  相似文献   

15.
In this paper we provide a translation of a paper by T. Levi-Civita, published in 1899, about the correspondence between symmetries and conservation laws for Hamilton’s equations. We discuss the results of this paper and their relationship with the more general classical results by E. Noether.  相似文献   

16.
We study a uniqueness question of entire functions order with their difference operators, and deal with a question in this paper extend the corresponding results obtained by Liu Examples are provided to show that the results in this paper, in sharing an entire function of smaller posed by Liu and Yang. The results -Yang and by Liu-Laine respectively. a sense, are the best possible.  相似文献   

17.
胡新启 《数学杂志》2000,20(3):265-268
本文通过对「1」中相应结构的讨论与改进,利用变分不等式求解技巧,讨论了Hilbert空间中一类广义变分不等式的解的迭代算法及其收敛性,指出了文「1」中主要结果的证明的一些不足之处,本文所得结果推广并改进了「1」的相应结论。  相似文献   

18.
《Quaestiones Mathematicae》2013,36(3):199-229
This paper is a direct continuation of the first paper in this series[Quaestiones Math. 8 (1985), no. 2,], which deals Kith the evolution problem [B(t)u(t)]' = A(t)u(t), Bu(0) = y. whereas in the first paper existence and uniqueness results were presented, this paper contains the ancillary results formulated in the first paper. These results describe the properties of B(t)-evolutions with non-stationary generating pairs, as well as of the solution operator of [B(t)u(t)]' = Au, Bu(0) = y.

The notation of the first paper is assumed throughout and is used without further note. Citation of results from the first paper is made by equation number. The numbering of this paper follows that of the first paper in sequence.  相似文献   

19.
We consider the problem of simultaneously selecting customers to be served by external carriers and routing a heterogeneous internal fleet. Very little attention was devoted to this problem. A recent paper proposed a heuristic solution procedure. Our paper shows that better results can be obtained by a simple method and corrects some erroneous results presented in the previous paper.  相似文献   

20.
The aim of this paper is to obtain some openness results in terms of normal coderivative for parametric set-valued mappings acting between infinite dimensional spaces. Then, implicit multifunction results are obtained by simply specializing the openness results. Moreover, we study a kind of metric regularity of the implicit multifunction. The results of the paper generalize several recent results in literature.  相似文献   

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