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如果实数x、y满足条件那么2x-y的最小值为A.2B.1C.-2D.-3
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如果实数x、y满足条件
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAAA/CAYAAABQHc7KAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
那么2x-y的最小值为( )
A.2
B.1
C.-2
D.-3
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