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已知x,y满足不等式组则目标函数z=3x+y的最大值为A.B.12C.8D.24
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已知x,y满足不等式组
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADgAAABWCAYAAACaeFU0AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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hnNuHPewfYRs+Py6wxPJ+VsPPMLv4/YBAK/0UWjk/Tx6fX1ixALg6zJ9MTYXnWTuSvtOBwkMyvfA
K4JUe/CqILWSWaDLqcJiZJwJlz8HQ00IFRIUdOk/Pqppd+6RD8pB7yMGFAAYd8fOX4eMrsAt3YYR
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2chaAojPRiLACGmQhwEa5xYG3QbYigGCJopWwaVKOq2PeoOrygS8v7M0m8kMutKgBLbS0AP7UtdS
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tUnoiSXXkb3moY1pGEjsO+p7OVXSrrfz7iodUP8ABvS0TaXIB5wAAAAASUVORK5CYII=
)
则目标函数z=3x+y的最大值为( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAAjCAYAAABLuFAHAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEFSURBVEhLzVSLDYQwCGWy7tR1ugyjMAqWq1Zo
Eb3TxDMxKvUBj88DvnHBDSw/AKbCCYBB7ow2GczNLncqTOq0RkbO3Vjf608dL077RzvTzoGJjDfM
O5gQzRmVZKJbzpLimLYmMZx3sER0OSuwzkrMNvJauFR0WVa04d9sU6tGXu034pJyLa295j47vDEn
9pIZwBJBtUpi1gqbGlbn2zewHgLd4wrsRdyG5PPc039gPH/cjhcj940xRVmnLbC5Q/IN/Rc5u2lG
ymKVZIQHynK6GIGyjGHigp0oyyH4irLEkSNl8ZRk5OUry4EMTa0LeJ9M2Kws2rmvYWohIhn/t9m+
uJe30l4AH1dqLsqGRQgAAAAASUVORK5CYII=
)
B.12
C.8
D.24
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A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAAjCAYAAABLuFAHAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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