剖析导数中易混淆的几组概念

导数是高中数学的重要内容,是研究函数问题的有效工具,也是近几年高考的热点.因此,熟练掌握导数的有关知识和概念是应用导数研究函数问题的关键,在教学中由于学生对概念理解不全面而导致解题错误的现象时有发生,其原因在于学生将几组概念混淆了,下面将这几组易混淆的概念进行剖     

导数

导数是高中数学的重要内容和后继学习的必备知识．数学科《考试大纲》要求考生：①理解导函数的概念，掌握函数在一点处的导数的定义和导数的几何意义。     

浅谈新课标与大纲下高中数学函数与导数难度定量分析

函数和导数都是每年高考的重点内容,也贯穿了整个高中数学课程。相比于教学大纲,新课标中函数和导数的难度都有所增加。新课标分析了函数和导数的由来以及数学模型的构建理念,新课标更是针对函数和导数应用过程增加了难度。在新课标下,高中数学教师要对函数和导数的难度进行定量分析,并结合教学内容和学生的特点来制定教学方案,实现有效教学。     

导数公式在高中数学中的应用

正近年来高考考试大纲的考点,大部分试题与导数有着千丝万缕的关系.从导数引申出来的考点比重逐渐上升,使得导数与函数、微积分、复合函数、反函数、隐函数之间的共通性愈加明显,尤其是函数的导数和导函数,以及函数图象与导数特性的融合,导数和函数的考试范畴逐渐加大.为此,本文研究导数公式在高中数学中的应用具有重要的实践意义.高中理科之间互相都有融合渗透,因为在物理学、几何学、经济学等学科中,一些重要概念都可以用导数来表示.从理科     

对导数及其应用的教与学的几点思考

1.体现导数优越性,将其精髓落到实处在微积分中,导数概念也是最核心的概念之一,它拥有广泛的应用范围以及丰富的背景.如何才能够让学生深入地理解导数的含义,充分地了解其思想和内涵,并且能够通过导数的应用去探索函数的极值、单调等性质,就成为高中数学教学中首先需要解决的问题之一.     

高中数学导数教学有效性探究

导数作为高中数学学习的主要内容和解决函数问题的主要工具在高考中占有重要的地位。本文从把握核心概念的本质、把握学生的困惑、把握解题规律、把握高考真题四个方面阐述了高中数学导数有效性教学的策略。     

如何用导数思想探究方程根的分布问题

导数是高中新课改后从高等数学下移到高中数学的内容,现已成为高中数学的重要知识,更是研究函数性质的有力工具.以导数为工具,能全面分析函数的单调性,进而解决函数的极值、最值等问题.尤其在高次方程以及超越方程根的分布问题的研究中有着传统工具无法比拟的优越性,它不仅可使解题过程变得简捷,而且还可以提高学生对新题型的适应能力.同时,也能有效考查学生的综合能力.因此,有关导数的工具性作用已成为这几年高考的热点,笔者根据自己多年的教学实践,结合以下几个实例     

导数及其应用的变式题辨析

高中数学新课程增加了“导数及其应用”的份量,与旧教材相比新教材在理念、编排、内容选择的处理上,都有很大的变化.新课程更加注重导数的本质概念;加强了导数在研究事物的变化率、函数的基本性质和优化问题中的应用,使学生感受和体会导数在处理上述问题中的一般性和有效性;淡化计算,避免过量的形式化运算练习;利用图形研究导数的几何意义,让学生体验导数在研究函数性质中的作用.新课程对导数及其应用提出了新的要求.在导数及其应用的教学过程中,我们可以通过变式题来加强学生对概念的理解,培养学生数学思维的灵活性,提高导数应用能力.1.题…     

导数在高中数学解题中的运用分析

导数是微积分中的重要基础概念,其作为选修课进入高中课程之中,为高中阶段研究函数的相关性质提供较大的辅助作用.本人以导数在函数、切线以及不等式中的应用为例,探究其应用,侧重在高中数学解题中的应用方向进行分析.     

浅议高三函数与导数复习策略

<正>在高中数学知识体系中,函数是最核心的内容之一,其涉及面很广、综合性较强,在高中数学中具有很高的地位;导数是高中数学学习中,探索函数性质的重要工具,也是衔接高中、大学数学知识的关键。将函数与导数有机地结合起来,可以充分降低学生的高三复习难度,让学生更加系统地把握数学知识,有助于学生更好地应对高考。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…