【单选题】形式运算阶段的儿童,其思维特征是( )。
【简答题】求下列函数的导数: (1)y=sin3x; (2) 。
【简答题】求下列函数的导数: (1)y= ; (2)y=sin 2 (2x+ ); (3)y=x .
【单选题】His behavior. _______ his lazy attitude toward to work.
【单选题】已知函数 f(x)=sin( π 3 -x) ,则要得到其导函数y=f′(x)的图象,只需将函数y=f(x)的图象( )
【简答题】关于出境、入境 John, an Italian. If he goes to Beijing, for Italy, his behavior is 1. _______ For China, his behavior is 2. __________ For both Italy and China, his behavior is 3. __________
【判断题】I observe frequently his behavior.
【简答题】He was loud and angry, and his friends told him to _____his behavior. A) modify B) convert C) transform D) differ
【简答题】(1)求函数 y= x+3 x 2 +3 的导数 (2)已知 f(x)= x 3 +4cosx-sin π 2 ,求f'(x)及 f′( π 2 ) .