已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
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![已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围](/uploads/image/z/3740892-60-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3%7Bx%E2%89%A70+y%E2%89%A7x+4x%2B3y%E2%89%A612%7D.z%3D2y%2B3%2Fx%2B1+%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
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