问题
填空题
若
,则a=______,b=______.
答案
参考答案:1,-4
解析: 因为
,且
=0,所以
=0,得a=1,于是由等价无穷小代换
,
得b=-4.因此,a=1,b=-4.
若
,则a=______,b=______.
参考答案:1,-4
解析: 因为
,且
=0,所以
=0,得a=1,于是由等价无穷小代换
,
得b=-4.因此,a=1,b=-4.
情景交际。从方框中选择适当的句子补全对话。其中有两项是多余的。 | |
A: Excuse me, Wang Shan. 1 B: Sorry, I don't know. 2 Please go and ask Ted. A: Excuse me. What time is it, please? C: It's about 3:30 p.m. A: Thank you, Ted. C: 3 Look, under the desk. B: Is it black? C: 4 B: Let me have a look. Oh, it's mine. C: 5 B: Thanks very much.
|