若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y
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若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y
![若x,y满足约束条件,x>=0,y>=0,x-y>=-1,3x+4y](/uploads/image/z/18737481-57-1.jpg?t=%E8%8B%A5x%2Cy%E6%BB%A1%E8%B6%B3%E7%BA%A6%E6%9D%9F%E6%9D%A1%E4%BB%B6%2Cx%3E%3D0%2Cy%3E%3D0%2Cx-y%3E%3D-1%2C3x%2B4y)
线性规划,画出约束条件的图像,然后可得答案为4.
![](http://img.wesiedu.com/upload/2/0f/20fc22fe6912e94d0411baab7f719990.jpg)
![](http://img.wesiedu.com/upload/2/0f/20fc22fe6912e94d0411baab7f719990.jpg)
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