已知函数是奇函数,当时,,则=________. 答案:【答案】【解析】由函数是奇函数,所以恒成立,再将求的问题转化为求即可.解:因为函数是奇函数,所以,又当时,,所以,故答案为-4.选择填空:
——Excuse me, can you tell me how I can get to the railway
station?
——______
[ ]
A. Certainly. Take a No. 6 bus. B. No. Don't ask me.
C. Yes. I can. You can go by bus. D. No, I can't tell you.