已知三条直线l1:2x-y+a=0(a>0),l2:-4x+|2y+1=0,且l1与l2的距离是7√5/10⑴求a的值;⑵能否找到一点P,是P点同时满足下列三个条件:①P是第一象限得点;②P点到l1的距离是p点到l2的距离的1/2;③P点到l1
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![已知三条直线l1:2x-y+a=0(a>0),l2:-4x+|2y+1=0,且l1与l2的距离是7√5/10⑴求a的值;⑵能否找到一点P,是P点同时满足下列三个条件:①P是第一象限得点;②P点到l1的距离是p点到l2的距离的1/2;③P点到l1](/uploads/image/z/3019174-70-4.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%89%E6%9D%A1%E7%9B%B4%E7%BA%BFl1%3A2x-y%2Ba%3D0%28a%3E0%29%2Cl2%3A-4x%2B%7C2y%2B1%3D0%2C%E4%B8%94l1%E4%B8%8El2%E7%9A%84%E8%B7%9D%E7%A6%BB%E6%98%AF7%E2%88%9A5%2F10%E2%91%B4%E6%B1%82a%E7%9A%84%E5%80%BC%EF%BC%9B%E2%91%B5%E8%83%BD%E5%90%A6%E6%89%BE%E5%88%B0%E4%B8%80%E7%82%B9P%2C%E6%98%AFP%E7%82%B9%E5%90%8C%E6%97%B6%E6%BB%A1%E8%B6%B3%E4%B8%8B%E5%88%97%E4%B8%89%E4%B8%AA%E6%9D%A1%E4%BB%B6%EF%BC%9A%E2%91%A0P%E6%98%AF%E7%AC%AC%E4%B8%80%E8%B1%A1%E9%99%90%E5%BE%97%E7%82%B9%EF%BC%9B%E2%91%A1P%E7%82%B9%E5%88%B0l1%E7%9A%84%E8%B7%9D%E7%A6%BB%E6%98%AFp%E7%82%B9%E5%88%B0l2%E7%9A%84%E8%B7%9D%E7%A6%BB%E7%9A%841%2F2%EF%BC%9B%E2%91%A2P%E7%82%B9%E5%88%B0l1)
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