k=4
将Y=4X^2与y=kx-1联立方程得:
Y=4X^2(1)
y=kx-1(2)
将(2)代入(1)
4X^2-kx+1=0
又抛物线Y=4X^2与直线y=kx-1有唯一交点,即方程有唯一解
则,配方得k=4
已知抛物线Y=4X^2与直线y=kx-1有唯一交点,求k的值.
已知抛物线Y=4X^2与直线y=kx-1有唯一交点,求k的值.
数学人气:599 ℃时间:2020-04-22 17:46:08
优质解答
我来回答
类似推荐
猜你喜欢
- 120℃时,氯化钠的溶解度为36G,现将该温度的100克饱和溶液蒸发掉20g水,在冷却到20℃,问有多少g食盐晶体析出?
- 2一间教室长15米、宽9米,用面积0.6平方米的地砖铺地面,至少需要这种地砖多少块
- 3已知tana=2分之1 tan(a-b)=-5分之2则tan(b-2a)的值为? 谢谢 要有过程
- 4What ( ) you ( ) (talk) about?I am talking
- 5用反证法证明.
- 6猫头鹰是什么样子的
- 7几个英语填空 给的词是:fall in love with ,be able to
- 8in hte letter to the teacher,the lazy boy told a ( )that he was ill and( ) in bed
- 9——How are you ,Sam?——I'm( ).
- 10请各位大哥哥/大姐姐帮帮小妹吧!