问题
单项选择题
双曲线
在点处的切线方程是（）。
A、4x-y-4=0
B、-4x+y-4=0
C、-4x-y+4=0
D、4x+y-4=0
答案
参考答案：D
解析：
根据导数的几何意义，切线的斜率为
，故切线为
，或4x+y-4=0。
搜题请搜索小程序“爱下问搜题”
双曲线在点处的切线方程是（）。
A、4x-y-4=0
B、-4x+y-4=0
C、-4x-y+4=0
D、4x+y-4=0
参考答案：D
解析：
根据导数的几何意义，切线的斜率为，故切线为，或4x+y-4=0。
My _ _ home is in the country (乡下). The air there is fresh and it is _ _. My house is very beautiful. _ _ three floors. There is a river _ _ my house and behind _ _ is a big garden. I can _ _ trees and flowers in it .I like _ _ green everywhere and green is my _ _ color. I like to work in the _ _ and fish in the river. I’d like to invite my friends at my home .Then we can chat and play games. How _ _ we are.
|