设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x的取值范围.
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![设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x的取值范围.](/uploads/image/z/5009897-65-7.jpg?t=%E8%AE%BE%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3%7Bx-y-2%E2%89%A40+x%2B2y-5%E2%89%A50+y-2%E2%89%A40.%EF%BC%881%EF%BC%89%E6%B1%82z%3Dx%2By%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%EF%BC%9B%EF%BC%882%EF%BC%89%E6%B1%82u%3D%EF%BC%88x%2By%EF%BC%89%2Fx%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.)
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设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x的取值范围.
设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x的取值范围.
设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x的取值范围.
使用线性规划做,可解得(1)z=x+y的取值范围是3
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