B MU period 3课件
高中数学新人教B版选修1-1第三章导数及其应用3.1.3导数的几何意义课件

3.1.3 导数的几何意义
学习目标
XUEXIMUBIAO
1.了解导函数的概念,理解导数的几何意义. 2.会求简单函数的导函数. 3.根据导数的几何意义,会求曲线上某点处的切线方程. 4.正确理解曲线“过某点”和“在某点”处的切线,并会求其方程.
内容索引
NEIRONGSUOYIN
解析 设点 P(x0,2x20+4x0),
则 f′(x0)= lim Δx→0
fx0+Δx-fx0 Δx
= lim Δx→0
2Δx2+4Δx0x·Δx+4Δx=4x0+4,
令4x0+4=16,得x0=3,∴P(3,30).
12345
课堂小结
KETANGXIAOJIE
1.导数 f′(x0)的几何意义是曲线 y=f(x)在点(x0,f(x0))处切线的斜率,即 k=
线上,则以该点为切点的切线方程为y-f(x0)=f′(x0)(x-x0);若已知点不在 切线上,则应先设出切点(x0,f(x0)),表示出切线方程,然后求出切点.
∴x0=2,∴P(2,8+a). 将x=2,y=8+a代入到8x-y-15=0中,
得a=-7.
反思感悟 利用导数的几何意义将数与形联系起来,根据图象中切线与割线 的倾斜角的大小确定数据的大小.
f2-f1 跟踪训练 4 (1)已知函数 f(x)在 R 上可导,其部分图象如图所示,设
2-1
=a,则下列不等式正确的是
则12a-23a·|a3|=16, 解得a=±1.
核心素养之直观想象
HEXINSUYANGZHIZHIGUANXIANGXIANG
求切线倾斜角的范围
典例 已知点 P 在曲线 y=x3-x+32上,直线 l 为曲线在 P 点处的切线,求直 线 l 的倾斜角的取值范围.
人教PEP版六年级英语上册 Unit 3 Part B 第三课时 教学课件完整版

Dear Diary,
Let’s check.
Tomorrow is Mid-Autumn Festival. My family are going to _ge_t_ t_o_g_e_t_he_r__an_d__ha_v_e_a__b_ig_d_i_n_ne_r_. My aunt is going to_m_a_k_e_
What holiday is this?
Mid-Autumn Festival ['mɪd 'ɔːtəm ˈfestɪvl]
Mid-Autumn Festival is coming. What are Wu Binbin’s family going to do? Let’s have a look.
m__o_on_c_a_k_e_s. My grandma will t_el_l_u_s_a_s_t_or_y__ab_o_u_t_C_h_a_n_g’_e. Robin
and I are going to r_e_a_d_a__po_e_m_. This is our poem:
F is for family. We will all be together tonight. A is for autumn. It is the autumn season.
历). Tomorrow is the Dragon Boat Festival. I will be very happy. In the
伴你成长 morning, I’m going shopping with my parents. We are going to buy some
good food. Then we are going to watch dragon boat races. In the afternoon, my mom is going to make zongzi with my grandma. In the evening, we are going to have a big dinner together. ( T )1. The Dragon Boat Festival is on the fifth day of the fifth
B-Unit3课件(牛津小学英语课件)

Grammar rules
The courseware clearly explains the basic grammar rules of English, including sentence structure, tense, voice, andModifiers, to help students understand the grammatical structure of English sentences.
Practice activities
The courseware provides a variety of practice activities to help students consolidate their knowledge of grammar rules and improve their language skills.
B-Unit3 courseware (Oxford Elementary School Engli
目录
Course IntroductionTeaching contentteaching methodTeaching resourcesTeaching evaluation
01
Course Introduction
Word usage
The courseware emphasizes the correct usage of words in different contexts, including sentence structure, collocation, and idiomatic expressions, to help students use English more naturally and effectively.
Period 3 Section B 1a-1d课件

8. hurt one’s back 9. 包扎 10. cut one’s knee
பைடு நூலகம்
Look at the picture and make a conversation with you partner.
-What the matter with the man? -He… -What should he do? - I think…..
an X-ray f. told her to put her head
Problems
Treatments
Someone felt sick. Someone cut his knee.
√ b, c √ a, d
Someone had a fever.
Someone had a nosebleed. √ f
Someone had a fever.
Someone had a nosebleed. √
Someone hurt his back.
Someone got hit on the head. √
Listen again. Write the letter of each
1c treatment next to the problems you
Nurse: He cut his k__n_e_e_, so I washed the cut and put some _m__e_d_i_c_in__e on it. Then I
高中数学新人教B版必修5课件:第三章不等式章末复习

2 题型探究
PART TWO
题型一 利用均值不等式求最值
例1 函数y=a1-x(a>0,a≠1)的图象恒过定点A,若点A在直线mx+ny-1= 0(mn>0)上,则 m1 +1n 的最小值为__4__.
反思感悟 当所给附加条件是一个等式时,常见的用法有两个:一个是用这 个等式消元,化为命题角度1的类型;一个是直接利用该等式代入,或构造 定值.
跟踪训练2 设不等式x2-2ax+a+2≤0的解集为M,如果M⊆[1,4],求实数a 的取值范围.
题型三 一元二次不等式的解法
例3 解关于x的不等式x2-(a+a2)x+a3>0(a∈R).
反思感悟 对于含参数的一元二次不等式,若二次项系数为常数,则可先考 虑分解因式,再对参数进行讨论;若不易分解因式,则可对判别式分类讨论, 分类要不重不漏.
3.二元一次不等式表示的平面区域的判定 对于在直线Ax+By+C=0同一侧的所有点(x,y),实数Ax+By+C的符号相 同,取一个特殊点(x0,y0),根据实数Ax0+By0+C的正负即可判断不等式表 示直线哪一侧的平面区域,可简记为“直线定界,特殊点定域”.特别地, 当C≠0时,常取原点作为特殊点. 4.求目标函数最优解的方法 通过平移目标函数所对应的直线,可以发现取得最优解对应的点往往是可行 域的顶点(或边界),于是在选择题中关于线性计划的最值问题,可采用求解 方程组代入检验的方法求解.
第三章 不等式
章末复习
学习目标
XUEXIMUBIAO
1.整合知识结构,进一步巩固、深化所学知识. 2.能熟练利用不等式的性质比较大小、变形不等式、证明不等式. 3.会用均值不等式证明不等式,求解最值问题. 4.体会“三个二次”之间的内在联系在解决问题中的作用. 5.能熟练地运用图解法解决线性计划问题.
2024-2025学年人教版七年级英语上册_Period4[1]-课件
![2024-2025学年人教版七年级英语上册_Period4[1]-课件](https://img.taocdn.com/s3/m/003f3975cec789eb172ded630b1c59eef8c79ace.png)
[haus] [mauө] ['klaudi]
[hiə]
[ai'diə]
['өiətə] [diə]
[jiə] ['riəli]
[tſeə] [ðeə]
[peə] [weə']
[heə [ [eəpכ:t]
A
Dale Grace name age
/ei/ game Jane Dave
/æ/ Frank thank hand Alice
[baik] [klaim]
['taiəd] [rait] ['kwaiət]
[b כi] [dζכin]
[t כi] [kכin]
[p כint] [nכiz]
[sləu] [ðəuz]
[həum] [sməuk]
[nəu] [bəul]
[braun] ['flauə]
Unit 3 What color is it?
让我们来学习音标的基本知识
总数: 48 元音: 20 辅音: 28
(元音相当于汉语拼音中的韵母,辅音相当汉 语拼音中的声母)
达到目标
1.认识48个音标 2.根据音标能拼读单词 3.根据读音能够写出单词 4.看到生单词能马上读出来.
让我们来学习48个音标的读音
现在让我们来试着拼读单词
方法: 辅音和元音相拼,不能拼时 就读出那个音标的音. 先单个音节相拼,然后再连 起来.
[bi:t] [mi:t] [si:t] [ti:] [ni:t] [gri:n] [swi:t]
[ðis] [big] [mis] [siks]
[giv] [өiŋk] ['priti]
带电粒子在磁场中的运动--ppt课件(2024版)
v
2 t
Aθ
θB
●
b. 相对的弦切角(θ)相等,与
相邻的弦切角(θ′)互补
●
v
' 1800
O
ppt课件
8
带电粒子(不计重力)在匀强磁场中的运动
①圆心的确定 基本思路:圆心一定在与速度方向垂直 V 的直线上,通常有两种方法:
a、两个速度方向垂直线的交点。 (常用在有界磁场的入射与出射方向 O 已知的情况下)
粒子不打在极板上可能从左端穿出,也可能从右端穿出,必须全面分析问题.
ppt课件
26
◆带电粒子在圆形磁场区域中的运动
穿过圆形磁场区。画好辅助线(半径、速度、轨 迹圆的圆心、连心线)。
偏向角可由 tan r 求出。
2R
R
经历 时间由 t m 得出。
Bq
O′
vOr θ
v
注意:由对称性,射出线的反向延长线必过磁场圆的 圆心。
v
r
Br
d
300
ppt课件
21
2.在真空中宽d的区域内有匀强磁场B,质量为m,
电量为e,速率为v的电子从边界CD外侧垂直射入
磁场,入射方向与CD夹角θ,为了使电子能从磁场
的另一侧边界EF射出,v应满足的条件是:
A.v>eBd/m(1+sinθ) B.v>eBd/m(1+cosθ) C.v> eBd/msinθ D.v< eBd/mcosθ
比较学习:
L
E
O1 v
yF
θ
R B
O
这点与带电粒子在匀强电场中的偏转情况一
样吗?
ppt课件
23
◆带电粒子在矩形磁场区域中的运动
圆心
大学英语B3U3 Section B 课件
Section B
A life in film
Text study
Background information
2. Do you know Universal Studios?
Tips Universal Studios (also known as Universal City Studios or Universal Pictures), is one of the
Tips
• Romantic element; • Reality not fantasy; • Love story about human nature; • Deep connection with animals;
• Trust between human and animals;
…
2. What is the theme of this movie?
Presentation of the skill
Reading skill practice
Distinguishing between facts and opinions
A biography of a famous person usually includes important facts and opinions about the person. When you read such non-fiction articles, it is very important for you to know how to distinguish between facts and opinions. The ability can help you better follow the writer’s thinking and reasoning process and understand the reading deeper.
必修3unit3公开课课件.
必修3unit3公开课课件.一、教学内容二、教学目标1. 让学生掌握与加拿大相关的词汇、短语和句型,提高学生的英语阅读和听力水平。
2. 培养学生的英语口语表达能力,使其能够运用所学知识进行简单的日常交流。
3. 提高学生的英语写作能力,学会如何描述一个国家的地理、文化和风俗。
三、教学难点与重点1. 教学难点:词汇的用法、听力技巧、口语表达和写作技巧。
2. 教学重点:与加拿大相关的词汇、短语和句型,以及如何运用所学知识进行实际交流。
四、教具与学具准备1. 教具:多媒体设备、PPT、黑板、录音机。
2. 学具:教材、笔记本、字典。
五、教学过程1. 导入:通过展示加拿大的图片,引发学生对加拿大这个国家的兴趣,进而引入本节课的主题。
过程细节:展示图片,提问学生:“What do you know about Canada?”,让学生分享他们对加拿大的了解。
2. 阅读和词汇学习:引导学生阅读文章,学习与加拿大相关的词汇和短语。
过程细节:让学生自主阅读,然后进行小组讨论,进行全班分享。
3. 听力练习:播放与加拿大相关的听力材料,让学生回答问题。
过程细节:先让学生预测问题,然后听录音,回答问题,核对答案。
4. 口语表达:组织学生进行小组讨论,讨论加拿大的文化和风俗。
过程细节:给出讨论话题,让学生用所学词汇和句型进行交流,教师巡回指导。
5. 写作技巧:讲解如何描述一个国家的地理、文化和风俗,并进行写作练习。
过程细节:给出写作框架,让学生模仿范文进行写作,教师进行个别指导。
六、板书设计1. Canada – Land of the Maple Tree2. 重点词汇和短语:maple tree, Niagara Falls, Canadian culture, ice hockey, apologize, sled, Eskimo3. 口语和写作句型:How to describe a country, how to express culture and customs七、作业设计1. 作业题目:Write a short passage about Canada,including its geography, culture and customs.答案:Canada is a beautiful country located in the northern part of North America. It is known for its maple trees, Niagara Falls and ice hockey. Canadian culture isdiverse, with people from different ethnic backgrounds living together harmoniously. Some famous Canadian customs include apologize, sled and Eskimo.2. 作业要求:不少于100词,要求使用本节课所学的词汇和句型。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
Henry runs away, but the black shape ________ him. Hfoelnlorywsstops. He looks at the black shape. It _______ too.
He is not ___s_t_o_p_s_ now. He likes his neawfrafirdiend. He likes
a black shape 一个黑影
PPT学习交流
9
It is a beautiful sunny day.
Henry the dog walks down the road.
He walks . His shadow follows him.
He hears a sound. He looks back and 强调看的动作
PPT学习交流
2
How about your shadow?
Look at my shadow. She’s/He’s my ______. My shadow often ______. Sometimes ______________ . Sometimes ______________ . Sometimes ______________ . I like my shadow.
be like 像
a beautiful sunny day 一个美好晴朗的一天
PPT学习交流
7
You are like me. 你像我 She is like her mother.她像她的妈妈。 She likes music.她喜欢音乐。
PPT学习交流
8
It is a beautiful sunny day. Henry the dog walks down the road. He walks . His shadow follows him. He hears a sound. He looks back and sees a black shape behind him . It is like him.
4B M1U3 Look at the shadow!
Period 3
PPT学习交流
1
Sing a song
Sometimes it’s big and tall. Sometimes it’s short and small. Sometimes it’s on the wall. Sometimes it’s on the floor. And when the light goes off, Your won’t see it any more
PPT学习交流
5
What’s the dog’s name?
Henry. What colour is the dog?
He is yellow and brown. What has he got?
walk down
沿着. . .走
He has two long brown ears. What does he like to do?
He likes to walk down the road on sunny days.
PPT学习交流
6
sound / saund /
声音
It is a beautiful sunny day. Henry the dog walks down the road. He walks . His shadow follows him. He hears a sound. He looks back and sees a black shape behind him . It is like him.
follow 跟随
fox
stop 停
yellow
PPT学习交流
4
The _____ has a shadow. The shadow follows ______. The cat runs. The shadow ______. The cat stops. The shadow ______. How funny!
PPT学习交流
14
It is a beautiful sunny day. Henry the dogw_a_lk__s___ down the road. Henry hears a ___s_o__u_n_d. He looks back
and sees a black shape behind him, Henry is afraid.
PPT学习交流
3
Alice has a shadow. The shadow follows her. How funny!
The cat has a shadow. The shadow follows the cat.. The cat runs. The shadow runs. The cat ssttoopps. The shadow stops. How funny!
sees a black shape behind him .
It is like him. 强调看的结果
look back 回头看
PPT学习交流
10
Henry the dog
PPT学习交流
11
Henry the dog
bite 咬 bike fine vine pineapple run away 跑着离开
PPdog
play with sb. 和某人一起玩 like playing with it 喜欢和它一起玩
PPT学习交流
13
True or false
( F ) 1. Henry sees a big black dog. ( F ) 2. The black shape runs after Henry. ( T ) 3. The black shape is Henry’s shadow. ( F ) 4. Henry does not like his new friend.
playing with it.
PPT学习交流
15
bee /i:/
sheep sleep tree green