两条直线y=kx+2k+1和x+2y-4=0的交点在第四象限,k的取值范围是什么答案是k>1/2,为什么不是-1/2
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![两条直线y=kx+2k+1和x+2y-4=0的交点在第四象限,k的取值范围是什么答案是k>1/2,为什么不是-1/2](/uploads/image/z/6859685-29-5.jpg?t=%E4%B8%A4%E6%9D%A1%E7%9B%B4%E7%BA%BFy%3Dkx%2B2k%2B1%E5%92%8Cx%2B2y-4%3D0%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9C%A8%E7%AC%AC%E5%9B%9B%E8%B1%A1%E9%99%90%2Ck%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%E4%BB%80%E4%B9%88%E7%AD%94%E6%A1%88%E6%98%AFk%3E1%2F2%2C%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E6%98%AF-1%2F2)
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