—Yes, it is interesting film. I like it very much.
A:a;an
B:the: an
C:a;the
D:the; a
(I)求函数f(x)的值域;
(II)已知锐角△ABC的两边长分别是函数f(x)的最大值和最小值,且△ABC的外接圆半径为 324 ,求△ABC的面积.