【简答题】Put the following sentences into the right order and make it a complete letter of settlement of accounts. a. In order to avoid subsequent amendments,please see to it that the contents of the L/C are i...
【简答题】已知 OA =(2asi n 2 x,a) , OB =(-1,2 3 sinxcosx+1) ,O为坐标原点,a≠0,设 f(x)= OA ? OB +b ,b>a. (I)若a>0,写出函数y=f(x)的单调递增区间; (II)若函数y=f(x)的定义域为 [ π 2 ,π] ,值域为[2,5],求实数a与b的值.