已知一次函数y=kx+b的图像经过点A(0,1)和点B(a,-3a),a<0,且点B在反比例函数y=-3/x的图像上1:求a的值2:求这个一次函数y的值在-1≤y≤3的对应的x的取值范围3:如果P(m,y1),Q(m+1,y2)是这
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![已知一次函数y=kx+b的图像经过点A(0,1)和点B(a,-3a),a<0,且点B在反比例函数y=-3/x的图像上1:求a的值2:求这个一次函数y的值在-1≤y≤3的对应的x的取值范围3:如果P(m,y1),Q(m+1,y2)是这](/uploads/image/z/4536706-58-6.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%80%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dkx%2Bb%E7%9A%84%E5%9B%BE%E5%83%8F%E7%BB%8F%E8%BF%87%E7%82%B9A%EF%BC%880%2C1%EF%BC%89%E5%92%8C%E7%82%B9B%EF%BC%88a%2C-3a%EF%BC%89%2Ca%EF%BC%9C0%2C%E4%B8%94%E7%82%B9B%E5%9C%A8%E5%8F%8D%E6%AF%94%E4%BE%8B%E5%87%BD%E6%95%B0y%3D-3%2Fx%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8A1%EF%BC%9A%E6%B1%82a%E7%9A%84%E5%80%BC2%EF%BC%9A%E6%B1%82%E8%BF%99%E4%B8%AA%E4%B8%80%E6%AC%A1%E5%87%BD%E6%95%B0y%E7%9A%84%E5%80%BC%E5%9C%A8-1%E2%89%A4y%E2%89%A43%E7%9A%84%E5%AF%B9%E5%BA%94%E7%9A%84x%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B43%EF%BC%9A%E5%A6%82%E6%9E%9CP%EF%BC%88m%2Cy1%EF%BC%89%2CQ%EF%BC%88m%2B1%2Cy2%EF%BC%89%E6%98%AF%E8%BF%99)
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