题目

定义在R上的函数且当时，.则等于       (     ) A.                B.               C.               D. 答案：C 解析: 因为 f(x/5)=f(x)/2  又因为 f(4/5)=1/2 ,把x=4/5代进去,然后再把x=4/5^2代进去,这样不断下去.—Professor Johnson, I'm afraid I can't finish the report within this week.—________. How about next week? [     ]A. Good for you  B. It won't bother meC. Not at all  D. That's OK