【简答题】(文科)设x,y满足约束条件 x+y≤1 y≤2x y≥ 1 2 x ,则目标函数z=6x+3y的最大值是______.
【单选题】假设原始问题为: max z=2x 1 -x 2 +3x 3 -2x 4 s.t. x 1 +3x 2 - 2x 3 + x 4 ≤12 -2x 1 + x 2 -3x 4 ≥8 3x 1 - 4x 2 +5x 3 - x 4 = 15 x 1 ≥0, x 2 :Free, x 3 ≤0, x 4 ≥0 则对偶问题中约束条件及决策变量的符号依次为: min y=12w 1 +8w 2 +15w...
【单选题】若x,y满足约束条件 x+y≤0 x-y≥-1 2x-y≤2 ,则目标函数z=x-2y的最小值是( )
【单选题】设变量x,y满足约束条件 x+y≥3 x-y≥-1 2x-y≤3 ,则目标函数 z= y+1 x 的取值范围是( )
【简答题】设变量x,y满足约束条件 x+y≥3 x-y≥-1 2x-y≤3 ,则2x+3y的最大值为______.
【简答题】阅读短文,根据短文内容,在表中填入相应信息(每空不超过三个单词,共5小题,每小题2分)) Learning a new language isn’t easy. For many of us, speaking the language is even harder! Here are some tips(建议)to help you become more comfortable speakin...
【判断题】单击鼠标触发的Click事件属于系统事件。
【单选题】The study which applies the findings of linguistics to teaching English as a foreign language is often referred to as______.