题目
过点P(-1,3),且平行于直线2x-4y+1=0的直线方程为( )
A. 2x+y-5=0
B. 2x+y-1=0
C. x-2y+7=0
D. x-2y-5=0
A. 2x+y-5=0
B. 2x+y-1=0
C. x-2y+7=0
D. x-2y-5=0
提问时间:2021-03-24
答案
设所求的行于直线2x-4y+1=0的直线方程为2x-4y+c=0,
把点P(-1,3),代入可得-2-12+c=0,c=14,
故要求的直线方程为 2x-4y+14=0,即 x-2y+7=0,
故选:C.
把点P(-1,3),代入可得-2-12+c=0,c=14,
故要求的直线方程为 2x-4y+14=0,即 x-2y+7=0,
故选:C.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
- 1英语翻译
- 2the rock music is better than chinese pop music
- 3walking is good exercise.为什么不加a?
- 4在“饱经风霜”中“饱”的意思
- 5How do you like China?改为同义句 ------ ------ you ---- -------- china?
- 6public schools in the united states are under the control of the individual stats
- 7为什么氟的电负性最强
- 8Ⅱ.阅读理解 Every time you turn on the television or take a ride in a car,you could
- 9带有成语的诗句
- 10随机事件概率的范围
热门考点
- 1填空,使每横行组成一个单词.
- 2Engels,(------)native language was German,could read and write in several foreign languages.
- 3数学题目sinx-cosx=1/3,则sin2x=?
- 4张骞前后两次出使西域的目的分别是什么?其过程与历史作用又有何不同?
- 5195mm等于多少m
- 6(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简
- 7谁有an English letter. IF 从句练习改错题 初中英语
- 8分析函数间断点f(x)=(10^x-1)/x,
- 9successfully flew over the South pole for the first time.开头的successfully为什么用ly形式,
- 10You can see three people in the family photo