【正文】
ely rely on recognizing that the law, but there is a link in accordance with certain laws are often easy to catch us, and such laws expressed in mathematical language, which often results in the formation of a differential equation, and once obtained equation, the law is clearSo we must be able to find its solution.Meanwhile, for the appropriate differential equation we have a general formula to solve. However, as we all know, not all forms of firstorder differential equations are appropriate differential equation.For these are not appropriate differential equation differential equation, how it obtained its solution, which we are discussing here need to use the integrating factorKeywords:Differential equation。人所共知,常微分方程從它產(chǎn)生的那天起, 就是研究自然界變化規(guī)律、研究人類社會結(jié)構(gòu)、生態(tài)結(jié)構(gòu)和工程技術(shù)問題的強有力工具。這個階段主要是討論各種具體類型方程的積分法, 把解表示為初等函數(shù)或初等函數(shù)的積分形式。這是建立常徽分方程基礎(chǔ)的階段。如果能將一個非恰當微分方程化為恰當微分方程,則求其通解將變得簡單。積分因子的形式各異,以致積分因子存在的充要條件將形式各異。結(jié)論3 方程有形如的積分因子的充要條件是,且積分因子為。結(jié)論5 方程有形如的積分因子的充要條件是,且積分因子。結(jié)論7 方程有形如的積分因子的充要條件是,且積分因子。故方程有形如的積分因子的充要條件是,且積分因子。命題1 可分離變量方程,有積分因子。第3章 積分因子求法的推廣微分方程積分因子求法的推廣主要寫了幾類特定微分方程的積分因子的求法,極大的提高了我們計算積分因子的速度,對我們的學(xué)習(xí)有很大幫助。感謝數(shù)學(xué)與計算科學(xué)學(xué)院各位老師在大學(xué)四年里對本人的栽培,感謝在大學(xué)四年里幫助過本人的各位老師,感謝他們一直來對本人的支持與鼓