《高等數(shù)學(xué)》針對(duì)高等學(xué)校本科生編寫的數(shù)學(xué)教材,內(nèi)容架構(gòu)從學(xué)生的實(shí)際出發(fā),全書共12章,分上、下兩冊(cè)出版。本書為上冊(cè),共7章,主要內(nèi)容包括函數(shù)、極限與連續(xù),導(dǎo)數(shù)與微分,一元函數(shù)微分學(xué)的應(yīng)用,不定積分,定積分,定積分的應(yīng)用和微分方程,每一章除具體知識(shí)點(diǎn)講解外,還增設(shè)復(fù)習(xí)題板塊,書末還附有積分表及習(xí)題參考答案,可幫助學(xué)生及時(shí)鞏固應(yīng)用理論知識(shí)。本教材覆蓋知識(shí)點(diǎn)全面、講解通俗易懂、試題類型豐富,可更好地滿足教學(xué)需要。
黃文韜,男,教授,博士生導(dǎo)師,廣西師范大學(xué)黨委常委、副校長(zhǎng),中國(guó)生物數(shù)學(xué)學(xué)會(huì)副理事長(zhǎng),廣西數(shù)學(xué)會(huì)副理事長(zhǎng)。主要微分方程定性理論、計(jì)算機(jī)符號(hào)計(jì)算研究。近年來發(fā)表學(xué)術(shù)論文50余篇,其中SCI收錄30余篇,出版英文學(xué)術(shù)專著2部,教材4部,主持完成國(guó)家自然科學(xué)基金1項(xiàng),主持在研國(guó)家自然科學(xué)基金1項(xiàng)。
第1 章 函數(shù)、極限與連續(xù) ············································································· 1
1.1 映射與函數(shù) ························································································· 1
1.1.1 集合的概念 ··················································································· 1
1.1.2 區(qū)間與鄰域 ··················································································· 2
1.1.3 映射與函數(shù)的概念 ·········································································· 3
1.1.4 函數(shù)的幾種特性 ············································································· 6
1.1.5 反函數(shù)與復(fù)合函數(shù)、函數(shù)的運(yùn)算 ························································ 9
1.1.6 基本初等函數(shù)、初等函數(shù) ································································ 13
1.1.7 函數(shù)的參數(shù)表示和極坐標(biāo)表示 ·························································· 18
習(xí)題1.1 ··································································································· 22
1.2 數(shù)列的極限 ························································································ 24
1.2.1 數(shù)列極限的定義 ············································································ 24
1.2.2 數(shù)列極限的性質(zhì) ············································································ 27
習(xí)題1.2 ··································································································· 29
1.3 函數(shù)的極限 ························································································ 30
1.3.1 自變量趨向無窮大時(shí)函數(shù)的極限 ······················································· 30
1.3.2 自變量趨于有限值時(shí)函數(shù)的極限 ······················································· 31
1.3.3 函數(shù)極限的性質(zhì) ············································································ 34
習(xí)題1.3 ··································································································· 37
1.4 無窮小量與無窮大量 ············································································ 38
1.4.1 無窮小量的概念 ············································································ 38
1.4.2 無窮小量的性質(zhì) ············································································ 39
1.4.3 無窮大量 ····················································································· 39
習(xí)題1.4 ··································································································· 42
1.5 極限的運(yùn)算法則 ·················································································· 42
1.5.1 極限的四則運(yùn)算法則 ······································································ 42
1.5.2 復(fù)合函數(shù)的極限運(yùn)算法則 ································································ 45
習(xí)題1.5 ··································································································· 46
1.6 極限存在準(zhǔn)則與兩個(gè)重要極限 ································································ 48
1.6.1 極限存在準(zhǔn)則 ··············································································· 48
1.6.2 兩個(gè)重要極限 ··············································································· 50
習(xí)題1.6 ··································································································· 55
1.7 無窮小量的比較 ················································································· 56
1.7.1 無窮小量的比較 ············································································ 57
1.7.2 利用等價(jià)無窮小求極限 ··································································· 58
習(xí)題1.7 ··································································································· 60
1.8 函數(shù)的連續(xù)與間斷 ·············································································· 61
1.8.1 函數(shù)連續(xù)性的概念 ········································································· 61
1.8.2 連續(xù)函數(shù)的運(yùn)算法則與初等函數(shù)的連續(xù)性 ··········································· 62
1.8.3 函數(shù)的間斷點(diǎn) ··············································································· 63
1.8.4 閉區(qū)間上連續(xù)函數(shù)的性質(zhì) ································································ 66
習(xí)題1.8 ··································································································· 69
拓展閱讀 ································································································· 70
總習(xí)題一 ································································································· 71
第2 章 導(dǎo)數(shù)與微分 ····················································································· 76
2.1 導(dǎo)數(shù)的概念 ······················································································· 76
2.1.1 引例 ··························································································· 76
2.1.2 導(dǎo)數(shù)的定義 ·················································································· 77
2.1.3 導(dǎo)數(shù)的幾何意義 ············································································ 80
2.1.4 函數(shù)可導(dǎo)性與連續(xù)性的關(guān)系 ····························································· 81
習(xí)題2.1 ··································································································· 82
2.2 導(dǎo)數(shù)的求導(dǎo)法則 ················································································· 83
2.2.1 導(dǎo)數(shù)的四則運(yùn)算法則 ······································································ 83
2.2.2 反函數(shù)的求導(dǎo)法則 ········································································· 85
2.2.3 復(fù)合函數(shù)的求導(dǎo)法則 ······································································ 86
2.2.4 導(dǎo)數(shù)表(常數(shù)和基本初等函數(shù)的導(dǎo)數(shù)公式) ··········································· 87
習(xí)題2.2 ··································································································· 88
2.3 高階導(dǎo)數(shù) ·························································································· 89
2.3.1 高階導(dǎo)數(shù)的概念 ············································································ 89
2.3.2 高階導(dǎo)數(shù)的計(jì)算 ············································································ 89
習(xí)題2.3 ··································································································· 92
2.4 隱函數(shù)和參數(shù)方程所確定的函數(shù)的導(dǎo)數(shù)及其相關(guān)變化率 ······························ 93
2.4.1 隱函數(shù)的導(dǎo)數(shù) ··············································································· 93
2.4.2 參數(shù)方程所確定的函數(shù)的導(dǎo)數(shù) ·························································· 95
2.4.3 相關(guān)變化率 ·················································································· 97
習(xí)題2.4 ··································································································· 98
2.5 函數(shù)的微分 ······················································································ 100
2.5.1 微分的概念 ················································································ 100
2.5.2 基本初等函數(shù)的微分公式和微分法則 ··············································· 101
2.5.3 微分的幾何意義及在近似計(jì)算中的應(yīng)用 ············································ 103
習(xí)題2.5 ································································································· 105
拓展閱讀 ······························································································· 107
總習(xí)題二 ······························································································· 108
第3 章 一元函數(shù)微分學(xué)的應(yīng)用 ···································································· 113
3.1 微分中值定理 ··················································································· 113
3.1.1 羅爾中值定理 ············································································· 113
3.1.2 拉格朗日中值定理 ······································································· 115
3.1.3 柯西中值定理 ············································································· 117
習(xí)題3.1 ································································································· 119
3.2 洛必達(dá)(L' Hospital)法則 ····································································· 119
3.2.1 “
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”型未定式 ·········································································· 120
3.2.2 “
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”型未定式 ·········································································· 121
3.2.3 其他型的未定式 ·········································································· 123
習(xí)題3.2 ································································································· 124
3.3 泰勒公式 ························································································· 125
3.3.1 函數(shù)逼近 ··················································································· 125
3.3.2 泰勒中值定理 ············································································· 125
3.3.3 泰勒公式的應(yīng)用 ·········································································· 128
習(xí)題3.3 ································································································· 129
3.4 函數(shù)的單調(diào)性、極值和最值 ································································· 130
3.4.1 函數(shù)的單調(diào)性 ············································································· 130
3.4.2 函數(shù)的極值 ················································································ 132
3.4.3 最大值與最小值問題 ···································································· 135
習(xí)題3.4 ································································································· 136
3.5 曲線的凹凸性與拐點(diǎn) ·········································································· 137
3.5.1 曲線的凹凸性 ············································································· 138
3.5.2 曲線的拐點(diǎn) ················································································ 140
習(xí)題3.5 ································································································· 142
3.6 曲率 ······························································································· 142
3.6.1 弧微分 ······················································································· 142
3.6.2 曲率及其計(jì)算公式 ········································································ 143
習(xí)題3.6 ·································································································· 146
3.7 函數(shù)的性態(tài)和圖形 ············································································· 146
3.7.1 漸近線 ······················································································· 147
3.7.2 函數(shù)圖形描繪 ·············································································· 148
習(xí)題3.7 ·································································································· 150
拓展閱讀 ································································································ 150
總習(xí)題三 ································································································ 151
第4 章 不定積分 ······················································································· 154
4.1 不定積分的概念與性質(zhì) ······································································· 154
4.1.1 原函數(shù)與不定積分的概念 ······························································· 154
4.1.2 基本積分表 ················································································· 155
4.1.3 不定積分的性質(zhì) ··········································································· 156
習(xí)題4.1 ·································································································· 158
4.2 不定積分的換元積分法 ······································································· 159
4.2.1 第一類換元法 ·············································································· 159
4.2.2 第二類換元法 ·············································································· 162
習(xí)題4.2 ·································································································· 166
4.3 不定積分的分部積分法 ······································································· 167
習(xí)題4.3 ·································································································· 170
4.4 有理函數(shù)的積分 ················································································ 170
4.4.1 有理函數(shù)的積分 ··········································································· 170
4.4.2 三角有理式的積分 ········································································ 173
4.4.3 簡(jiǎn)單無理式的積分 ········································································ 174
習(xí)題4.4 ·································································································· 176
拓展閱讀 ································································································ 176
總習(xí)題四 ································································································ 177
第5 章 定積分 ·························································································· 179
5.1 定積分的概念和性質(zhì) ·········································································· 179
5.1.1 引例 ·························································································· 179
5.1.2 定積分的定義 ·············································································· 181
5.1.3 定積分的近似計(jì)算 ········································································ 183
5.1.4 定積分的性質(zhì) ·············································································· 185
習(xí)題5.1 ································································································· 188
5.2 微積分基本公式 ················································································ 189
5.2.1 引例 ························································································· 190
5.2.2 積分上限的函數(shù)及其導(dǎo)數(shù) ······························································ 190
5.2.3 牛頓-萊布尼茨公式 ······································································ 193
習(xí)題5.2 ································································································· 194
5.3 定積分的換元法和分部積分法 ······························································ 196
5.3.1 定積分的換元法 ·········································································· 196
5.3.2 定積分的分部積分法 ···································································· 200
習(xí)題5.3 ································································································· 201
5.4 反常積分 ························································································· 202
5.4.1 無窮區(qū)間上的反常積分 ································································· 203
5.4.2 無界函數(shù)的反常積分 ···································································· 205
習(xí)題5.4 ································································································· 208
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5.5 反常積分的審斂法和Γ函數(shù) ······························································ 208
5.5.1 無窮區(qū)間上反常積分的判別法 ························································ 208
5.5.2 無界函數(shù)的反常積分的審斂法 ························································ 211
5.5.3 ? 函數(shù) ······················································································ 213
*習(xí)題5.5 ································································································ 214
拓展閱讀 ······························································································· 215
總習(xí)題五 ······························································································· 216
第6 章 定積分的應(yīng)用 ················································································ 220
6.1 定積分的元素法 ················································································ 220
6.2 定積分在幾何學(xué)上的應(yīng)用 ···································································· 222
6.2.1 平面圖形的面積 ·········································································· 222
6.2.2 體積 ························································································· 225
6.2.3 平面曲線的弧長(zhǎng) ·········································································· 228
習(xí)題6.2 ································································································· 231
6.3 定積分在物理學(xué)上的應(yīng)用 ···································································· 232
6.3.1 變力沿直線所做的功 ···································································· 232
6.3.2 水壓力 ······················································································ 233
6.3.3 引力 ························································································· 235
習(xí)題6.3 ································································································· 236
拓展閱讀 ······························································································· 237
總習(xí)題六 ······························································································· 239
第7 章 微分方程 ······················································································· 241
7.1 微分方程的基本概念 ·········································································· 241
習(xí)題7.1 ·································································································· 244
7.2 可分離變量的微分方程 ······································································· 244
習(xí)題7.2 ·································································································· 246
7.3 齊次方程 ························································································· 247
7.3.1 齊次方程及其解法 ········································································ 247
*
7.3.2 可化為齊次方程的微分方程 ··························································· 250
習(xí)題7.3 ·································································································· 252
7.4 一階線性微分方程 ············································································· 253
7.4.1 一階線性微分方程及常數(shù)變易法 ······················································ 253
7.4.2 伯努利方程 ················································································· 256
習(xí)題7.4 ·································································································· 257
7.5 可降階的二階微分方程 ······································································· 258
7.5.1 不含未知函數(shù) y和 y?的方程 y?? ? f (x) ··············································· 258
7.5.2 不含未知函數(shù) y的方程 y?? ? f (x, y?) ·················································· 259
7.5.3 不含自變量x的方程 y?? ? f ( y, y?) ····················································· 262
習(xí)題7.5 ·································································································· 263
7.6 二階線性微分方程解的結(jié)構(gòu) ································································· 264
7.6.1 二階線性微分方程 ········································································ 264
7.6.2 線性微分方程解的結(jié)構(gòu) ·································································· 265
習(xí)題7.6 ·································································································· 267
7.7 二階常系數(shù)齊次線性微分方程 ······························································ 268
習(xí)題7.7 ·································································································· 272
7.8 二階常系數(shù)非齊次線性微分方程 ··························································· 272
7.8.1 ( ) e ( ) x
m fx P x ?
? 型 ········································································· 273
7.8.2 1( ) e ( )cos x
m f x P x x ? ? ? 或 2( ) e ( )sin x
m f x P x x ? ? ? 型 ································ 276
習(xí)題7.8 ·································································································· 279
7.9 歐拉方程 ························································································· 280
習(xí)題7.9 ·································································································· 281
7.10 常系數(shù)線性微分方程組 ······································································ 281
習(xí)題7.10 ································································································ 283
拓展閱讀 ································································································ 283
總習(xí)題七 ································································································ 285
數(shù)學(xué)實(shí)驗(yàn)(上) ···························································································· 287
Python 簡(jiǎn)介及基本操作 ············································································· 287
實(shí)驗(yàn)1 割圓術(shù)、生長(zhǎng)模型 ········································································ 323
實(shí)驗(yàn)2 陳酒出售的最佳時(shí)機(jī)問題 ······························································· 327
實(shí)驗(yàn)3 泰勒展開與e 的計(jì)算 ····································································· 331
實(shí)驗(yàn)4 氫燃料電池堆優(yōu)化設(shè)計(jì) ·································································· 335
實(shí)驗(yàn)5 智慧農(nóng)場(chǎng)中根系層含水量估計(jì)與智能灌溉決策 ···································· 343
習(xí)題答案··································································································· 351
第1 章 函數(shù)、極限與連續(xù) ······································································· 351
第2 章 導(dǎo)數(shù)與微分 ················································································ 357
第3 章 一元函數(shù)微分學(xué)的應(yīng)用 ································································· 364
第4 章 不定積分 ··················································································· 369
第5 章 定積分 ······················································································ 374
第6 章 定積分的應(yīng)用 ············································································· 378
第7 章 微分方程 ··················································································· 380
主要參考文獻(xiàn) ···························································································· 387
附錄 積分表 ···························································································· 389
前言
《高等數(shù)學(xué)》作為理工科學(xué)生的必修基礎(chǔ)課程之一,歷來是培養(yǎng)學(xué)生數(shù)學(xué)素養(yǎng)、邏輯思維能力和科學(xué)研究能力的重要途徑. 隨著科技的飛速進(jìn)步和社會(huì)的發(fā)展,這門課程的教學(xué)內(nèi)容與方法也在不斷地變化和拓展. 本書分為上、下兩冊(cè),上冊(cè)內(nèi)容包括一元微積分學(xué)與常微分方程,下冊(cè)則涵蓋空間解析幾何、多元微積分學(xué)與級(jí)數(shù)等內(nèi)容. 本書既可作為普通高等學(xué)校理工科專業(yè)的本科教材,也可作為教學(xué)參考書.
在當(dāng)今高等數(shù)學(xué)的教材市場(chǎng)中,已經(jīng)存在諸多質(zhì)量較高的教材. 然而,隨著新一輪科技革命和產(chǎn)業(yè)變革的推進(jìn),傳統(tǒng)的教學(xué)內(nèi)容和方式也面臨著更新與革新的需求. 在這種時(shí)代背景下,我們編寫本書,旨在為數(shù)學(xué)教育和人才培養(yǎng)提供一種新的選擇. 具體來說,以下幾個(gè)方面的考慮促使了本書的誕生.
第一,在全球科技迅猛發(fā)展的今天,數(shù)學(xué)作為科學(xué)的基礎(chǔ)工具,在推動(dòng)技術(shù)創(chuàng)新、產(chǎn)業(yè)升級(jí)、社會(huì)進(jìn)步方面發(fā)揮著不可或缺的作用. 國(guó)家提出以“新”提“質(zhì)”,以“數(shù)”賦能新質(zhì)生產(chǎn)力的戰(zhàn)略目標(biāo),強(qiáng)調(diào)數(shù)學(xué)教育要注重創(chuàng)新性、實(shí)用性和社會(huì)應(yīng)用,培養(yǎng)具備跨學(xué)科視野和實(shí)踐能力的高素質(zhì)人才. 本書編寫之初,即立足于數(shù)字技術(shù)日新月異的發(fā)展趨勢(shì),力求將現(xiàn)代數(shù)學(xué)方法與實(shí)際產(chǎn)業(yè)需求結(jié)合,為學(xué)生提供具有前瞻性的數(shù)學(xué)教育內(nèi)容,為他們成為適應(yīng)新技術(shù)時(shí)代的創(chuàng)新型人才打下基礎(chǔ).
第二,課程思政已成為教育體系中的重要組成部分,數(shù)學(xué)作為一門基礎(chǔ)學(xué)科,也不應(yīng)置身事外. 本書在內(nèi)容設(shè)計(jì)上,從方法論和辯證統(tǒng)一的角度,努力深挖數(shù)學(xué)與思政教育的結(jié)合點(diǎn). 我們不僅關(guān)注學(xué)生數(shù)學(xué)知識(shí)的掌握,還注重培養(yǎng)學(xué)生正確的世界觀、人生觀和價(jià)值觀. 通過將思想政治教育有機(jī)融入數(shù)學(xué)教學(xué),我們旨在啟發(fā)學(xué)生樹立正確的人生理想、社會(huì)責(zé)任感與使命擔(dān)當(dāng),激發(fā)他們?yōu)閲?guó)家和社會(huì)做貢獻(xiàn)的意識(shí). 同時(shí),本書通過對(duì)數(shù)學(xué)思想和方法的剖析,提升學(xué)生的批判性思維和創(chuàng)新意識(shí),致力培養(yǎng)他們成為有理想、有信仰、有擔(dān)當(dāng)?shù)男聲r(shí)代青年.
第三,信息技術(shù)的迅猛發(fā)展,尤其是計(jì)算機(jī)與互聯(lián)網(wǎng)的普及以及人工智能的發(fā)展,帶來了教育模式的深刻變革. 在這種背景下,本書在內(nèi)容編排上力求既扎根基礎(chǔ),又面向應(yīng)用,兼顧數(shù)學(xué)思想和方法的傳授. 同時(shí),注重?cái)?shù)學(xué)的幾何背景與實(shí)際意義,以確保學(xué)生不僅掌握數(shù)學(xué)方法,更能理解其背后的思想. 為了滿足新時(shí)代教育的需求,進(jìn)一步提高學(xué)生解決實(shí)際問題和動(dòng)手操作的能力,本書特別增加了Python 數(shù)學(xué)實(shí)驗(yàn)的內(nèi)容,注重信息技術(shù)與數(shù)學(xué)的結(jié)合,支持學(xué)生利用Python 等工具進(jìn)行數(shù)學(xué)實(shí)驗(yàn),探索數(shù)學(xué)在現(xiàn)實(shí)世界中的應(yīng)用. 通過實(shí)踐性強(qiáng)的數(shù)學(xué)實(shí)驗(yàn),學(xué)生不僅能更好地掌握數(shù)學(xué)的基本概念,還能親身體驗(yàn)數(shù)學(xué)在現(xiàn)實(shí)問題中的應(yīng)用,增強(qiáng)動(dòng)手能力和創(chuàng)新思維. 人工智能的發(fā)展,特別是DeepSeek、豆包、Kimi等大模型的應(yīng)用,為數(shù)學(xué)教育注入了全新活力. 這些大模型具備強(qiáng)大的數(shù)據(jù)分析、智能解答以及模擬演示能力,能夠?yàn)閷W(xué)生提供多元化的學(xué)習(xí)輔助. 但我們建議,在高等數(shù)學(xué)基礎(chǔ)知識(shí)的學(xué)習(xí)階段,學(xué)生應(yīng)避免過度依賴大模型,以防造成思維惰性,削弱創(chuàng)新能力. 在獨(dú)立完成解題、建模、分析等任務(wù)后,學(xué)生可利用大模型進(jìn)行驗(yàn)證和比較,將其作為一種高效的輔助工具.
第四,當(dāng)今社會(huì)對(duì)高素質(zhì)應(yīng)用型人才的需求日益增加,數(shù)學(xué)作為基礎(chǔ)學(xué)科,其應(yīng)用價(jià)值也愈加突出. 本書在注重理論知識(shí)講解的同時(shí),也關(guān)注數(shù)學(xué)在實(shí)際工程、技術(shù)及科學(xué)研究中的應(yīng)用. 我們不僅強(qiáng)調(diào)數(shù)學(xué)的普遍性與抽象性,還在書中加入了大量與實(shí)際問題相關(guān)的案例和習(xí)題,力求讓學(xué)生在學(xué)好數(shù)學(xué)基礎(chǔ)的同時(shí),初步具備利用數(shù)學(xué)作為工具解決實(shí)際問題,特別是工程問題、科學(xué)研究問題的能力. 通過對(duì)數(shù)學(xué)方法的應(yīng)用和實(shí)踐,學(xué)生將能夠更好地應(yīng)對(duì)未來職業(yè)生涯中的挑戰(zhàn),尤其是在科技創(chuàng)新、工程技術(shù)、數(shù)據(jù)分析等領(lǐng)域中發(fā)揮重要作用.
總之,《高等數(shù)學(xué)》作為一門經(jīng)典的基礎(chǔ)課程,不僅關(guān)乎學(xué)科知識(shí)本身的傳授、創(chuàng)新,更承載著國(guó)家對(duì)未來人才的培養(yǎng)使命. 希望本書能夠幫助學(xué)生在數(shù)學(xué)的海洋中遨游,激發(fā)他們的探索精神,培養(yǎng)他們的創(chuàng)新能力和批判性思維,為未來的科學(xué)技術(shù)發(fā)展和社會(huì)進(jìn)步貢獻(xiàn)力量.
本書的編寫工作安排如下:第1~2章由李紹剛和劉期懷老師負(fù)責(zé),第3章由蔣利華老師負(fù)責(zé),第4章由林昕茜老師負(fù)責(zé),第5 章由楊龍老師負(fù)責(zé),第6 章由熊峰和黃逸飛老師負(fù)責(zé),第7 章由李光云老師負(fù)責(zé),第8章由齊恩鳳老師負(fù)責(zé),第9 章由陳翠玲和吳果林老師負(fù)責(zé),第10 章由李玉山老師負(fù)責(zé),第11 章由徐勐戩老師負(fù)責(zé),第12 章由黃良力和郭述鋒老師負(fù)責(zé),數(shù)學(xué)實(shí)驗(yàn)由黃文韜、何東平和黃婷老師負(fù)責(zé). 最后由黃文韜和劉期懷老師進(jìn)行統(tǒng)稿. 本教材編寫工作得到了廣西師范大學(xué)數(shù)學(xué)與統(tǒng)計(jì)學(xué)院、桂林電子科技大學(xué)數(shù)學(xué)與計(jì)算科學(xué)學(xué)院和桂林航天工業(yè)學(xué)院理學(xué)院領(lǐng)導(dǎo)和老師們的大力支持和幫助,在此一并表示誠摯的感謝.
限于編者水平,書中難免存在疏漏之處,懇請(qǐng)廣大讀者批評(píng)指正.
編 者
2025年6月
針對(duì)高等學(xué)校本科生編寫的數(shù)學(xué)教材,覆蓋知識(shí)點(diǎn)全面、講解通俗易懂、試題類型豐富,可更好地滿足學(xué)習(xí)高等數(shù)學(xué)的需要。
集合是數(shù)學(xué)中的一個(gè)最基本的概念,已滲透到數(shù)學(xué)的各個(gè)分支,成為現(xiàn)代數(shù)學(xué)的基礎(chǔ)和語言. 一般地,具有某種特定性質(zhì)的事物的總體稱為集合. 組成這個(gè)集合的對(duì)象稱為該集合的元素.
集合的表示方法主要有列舉法和描述法. 列舉法是將集合的元素一一列舉出來,寫在一個(gè)花括號(hào)內(nèi).
我們學(xué)習(xí)過的許多數(shù)學(xué)運(yùn)算都是成對(duì)互逆出現(xiàn)的,如加法與減法、乘法與除法. 在微分學(xué)部分,我們學(xué)習(xí)了如何求一個(gè)函數(shù)的導(dǎo)函數(shù),在這一章我們將討論的它的逆運(yùn)算,即尋找一個(gè)可導(dǎo)函數(shù),使它的導(dǎo)函數(shù)等于已知函數(shù).
微分方程作為一門重要的數(shù)學(xué)學(xué)科分支,其產(chǎn)生與發(fā)展緊密伴隨著人類生產(chǎn)實(shí)踐的需求. 歷經(jīng)三百余年的歷程,它不僅在數(shù)學(xué)領(lǐng)域占據(jù)著關(guān)鍵地位,還廣泛滲透到物理學(xué)、化學(xué)、腦科學(xué)、生物學(xué)、經(jīng)濟(jì)學(xué)等眾多學(xué)科,對(duì)推動(dòng)科學(xué)技術(shù)的進(jìn)步發(fā)揮了不可替代的作用. 如今,在21 世紀(jì),微分方程正以全新的科學(xué)思維模式,展現(xiàn)出蓬勃的生機(jī)與活力.
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