1、过点A(4,-2)任作一直线l与抛物线C:y^2=2x交于两个不同的点P,Q,问抛物线C上是否存在定点B,使∠PBQ总等于90°?证明结论.2、数列中a1=1,a2=1,an+2=an+an+1(后一项为前两项之和)能否求通项公式?不能
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 12:43:51
![1、过点A(4,-2)任作一直线l与抛物线C:y^2=2x交于两个不同的点P,Q,问抛物线C上是否存在定点B,使∠PBQ总等于90°?证明结论.2、数列中a1=1,a2=1,an+2=an+an+1(后一项为前两项之和)能否求通项公式?不能](/uploads/image/z/1247761-1-1.jpg?t=1%E3%80%81%E8%BF%87%E7%82%B9A%284%2C-2%29%E4%BB%BB%E4%BD%9C%E4%B8%80%E7%9B%B4%E7%BA%BFl%E4%B8%8E%E6%8A%9B%E7%89%A9%E7%BA%BFC%3Ay%5E2%3D2x%E4%BA%A4%E4%BA%8E%E4%B8%A4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E7%82%B9P%2CQ%2C%E9%97%AE%E6%8A%9B%E7%89%A9%E7%BA%BFC%E4%B8%8A%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E5%AE%9A%E7%82%B9B%2C%E4%BD%BF%E2%88%A0PBQ%E6%80%BB%E7%AD%89%E4%BA%8E90%C2%B0%3F%E8%AF%81%E6%98%8E%E7%BB%93%E8%AE%BA.2%E3%80%81%E6%95%B0%E5%88%97%E4%B8%ADa1%3D1%2Ca2%3D1%2Can%2B2%3Dan%2Ban%2B1%EF%BC%88%E5%90%8E%E4%B8%80%E9%A1%B9%E4%B8%BA%E5%89%8D%E4%B8%A4%E9%A1%B9%E4%B9%8B%E5%92%8C%EF%BC%89%E8%83%BD%E5%90%A6%E6%B1%82%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F%3F%E4%B8%8D%E8%83%BD)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 12:43:51