1.已知直线y=ax+b经过一、二、三象限,则直线y=-bx+a经过第( )象限.2.已知直线y=(1—2a)x+a—1不经过第一象限,则a的取值范围是( )3.直线y=-1/2x—3与x轴围成
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![1.已知直线y=ax+b经过一、二、三象限,则直线y=-bx+a经过第( )象限.2.已知直线y=(1—2a)x+a—1不经过第一象限,则a的取值范围是( )3.直线y=-1/2x—3与x轴围成](/uploads/image/z/2081501-53-1.jpg?t=1.%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFy%3Dax%2Bb%E7%BB%8F%E8%BF%87%E4%B8%80%E3%80%81%E4%BA%8C%E3%80%81%E4%B8%89%E8%B1%A1%E9%99%90%2C%E5%88%99%E7%9B%B4%E7%BA%BFy%3D-bx%2Ba%E7%BB%8F%E8%BF%87%E7%AC%AC%EF%BC%88%26%23160%3B%26%23160%3B%26%23160%3B%26%23160%3B+%EF%BC%89%E8%B1%A1%E9%99%90.2.%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFy%3D%EF%BC%881%E2%80%942a%EF%BC%89x%2Ba%E2%80%941%E4%B8%8D%E7%BB%8F%E8%BF%87%E7%AC%AC%E4%B8%80%E8%B1%A1%E9%99%90%2C%E5%88%99a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%EF%BC%88%26%23160%3B%26%23160%3B%26%23160%3B+%EF%BC%893.%E7%9B%B4%E7%BA%BFy%3D-1%EF%BC%8F2x%E2%80%943%E4%B8%8Ex%E8%BD%B4%E5%9B%B4%E6%88%90)
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