已知平面区域D由以A(1,3)B(5,2)C(3,1)为顶点的三角形内部和边界组成.若在区域D上有无穷多个点(x,y)可使目标函数z=x+my取得最小值,则m等于()A.-2B.-1C.1D.4目标函数的斜率为啥和AC的相同啊 为啥不
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![已知平面区域D由以A(1,3)B(5,2)C(3,1)为顶点的三角形内部和边界组成.若在区域D上有无穷多个点(x,y)可使目标函数z=x+my取得最小值,则m等于()A.-2B.-1C.1D.4目标函数的斜率为啥和AC的相同啊 为啥不](/uploads/image/z/3276586-10-6.jpg?t=%E5%B7%B2%E7%9F%A5%E5%B9%B3%E9%9D%A2%E5%8C%BA%E5%9F%9FD%E7%94%B1%E4%BB%A5A%281%2C3%29B%285%2C2%29C%283%2C1%29%E4%B8%BA%E9%A1%B6%E7%82%B9%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E5%86%85%E9%83%A8%E5%92%8C%E8%BE%B9%E7%95%8C%E7%BB%84%E6%88%90.%E8%8B%A5%E5%9C%A8%E5%8C%BA%E5%9F%9FD%E4%B8%8A%E6%9C%89%E6%97%A0%E7%A9%B7%E5%A4%9A%E4%B8%AA%E7%82%B9%EF%BC%88x%2Cy%29%E5%8F%AF%E4%BD%BF%E7%9B%AE%E6%A0%87%E5%87%BD%E6%95%B0z%3Dx%2Bmy%E5%8F%96%E5%BE%97%E6%9C%80%E5%B0%8F%E5%80%BC%2C%E5%88%99m%E7%AD%89%E4%BA%8E%EF%BC%88%29A.-2B.-1C.1D.4%E7%9B%AE%E6%A0%87%E5%87%BD%E6%95%B0%E7%9A%84%E6%96%9C%E7%8E%87%E4%B8%BA%E5%95%A5%E5%92%8CAC%E7%9A%84%E7%9B%B8%E5%90%8C%E5%95%8A+%E4%B8%BA%E5%95%A5%E4%B8%8D)
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