皮皮学，免费搜题
登录
搜题
【简答题】
抛物线C的方程为y=ax 2 （a＜0），过抛物线C上一点P（x 0 ，y 0 ）（x 0 ≠0）作斜率为k 1 ，k 2 的两条直线分别交抛物线C于 A（x 1 ，y 1 ）B（x 2 ，y 2 ）两点（P，A，B三点互不相同），且满足k 2 +λk 1 =0（λ≠0且λ≠-1）． （Ⅰ）求抛物线C的焦点坐标和准线方程； （Ⅱ）设直线AB上一点M，满足 BM =λ MA ，证明线段PM的中点在y轴上．
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】satellite automate vapor in the air expansion hazard incorporate take control of lucrative magnetic get/ be stuck in mount bunch vibrate approximately calculate 9. At the beginning of the rac...
【简答题】用所给词的适当形式填空。 1. At that moment I saw a dog _______(lie) on the floor. 2. At the beginning of the _______(twenty) century,the world's population was 1.7 billion. 3. The _______(shelf) in his study are ...
【单选题】Listen to the conversation and answer Questions 9-11 . At the beginning of the conversation, the woman thinks she keeps running out of money because ( ).
A.
she earns too little
B.
she spends too much.
C.
she does not make a good plan
D.
she doesn't know the reason
【单选题】由于幼儿是以自我为中心辨别左右方向,幼儿园教师在示范动作时应该
A.
背对幼儿，采用镜面示范
B.
面对幼儿，采用镜面示范
C.
面对幼儿，采用正常示范
D.
背对幼儿，采用正常示范
【单选题】由于幼儿是以自我为中心辨别左右方向，幼儿教师在动作示范时应该
A.
背对幼儿，采用镜面示范
B.
面对幼儿，采用镜面示范
C.
面对幼儿，采用正常示范
D.
背对幼儿，采用正常示范
相关题目：
参考解析：
知识点：
题目纠错 0
发布
