1:若方程y+p(x)y=0的一个特解为y=cos2x则该方程满足初值条件y(0)=2的 特解为() A cos 2x+2 B cos 2x+1 C2 coS x cos 2X 答案D 解:将y=cos2x代入方程求出函数p(x)再求解方程得到正确答案为D.也可以作 如下分析一阶线性齐次方程 y+p(x)y=0任意两个解只差一个常数因子所以A,B,C三个选项都不是该方程的解 2微分方程“卫
Book 4 Teaching Plan Unit 1 TextA Who Is Great Text B How to Be a Leader I. teaching purpose and requirement A. understand the main idea and structure of the texts Text A main idea a. Who is great? \Someone who has made lasting contribution to human civilization is great\. b. the common characteristics the great achiever shave ------an unrelenting drive to succeed (Greatness is built upon tremendous amounts of study