【简答题】如果f(x 0 )是函数f(x)的一个极值,称点(x 0 ,f(x 0 ))是函数f(x)的一个极值点.已知函数f(x)=(ax-b) e a x (x≠0且a≠0) (1)若函数f(x)总存在有两个极值点A,B,求a,b所满足的关系; (2)若函数f(x)有两个极值点A,B,且存在a∈R,求A,B在不等式|x|<1表示的区域内时实数b的范围. (3)若函数f(x)恰有一个驻点A,且存在a∈R,使...
【单选题】Choose the correct topic sentence to fill in the blank. 为下面段落选择合适的主题句 When you buy insurance, you enter into a written agreement with the insurance company. ______. An insurance policy is an agreement...