首页
已知x,y满足不等式组则z=20-2y+x的最大值是A.21B.23C.25D.27
试题详情
已知x,y满足不等式组
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEcAAAA/CAYAAACywdWzAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
则z=20-2y+x的最大值是( )
A.21
B.23
C.25
D.27
相关试题
-
已知x,y满足不等式组
则z=20-2y+x的最大值是( )
A.21
B.23
C.25
D.27
-
(文)已知x,y满足不等式组
则z=20-2y+x的最大值=________.
-
若整数x,y满足不等式组
则2x+y的最大值是( )
A.11
B.23
C.26
D.30
-
若整数x,y满足不等式组
则2x+y的最大值是( )
A.11
B.23
C.26
D.30
-
若整数x,y满足不等式组
则2x+y的最大值是( )
A.11
B.23
C.26
D.30
-
设等差数列{an}满足:3a8=5a13,且a1>0,Sn为其前n项之和,则Sn中最大的是( )
A.S21
B.S20
C.S11
D.S10
-
已知x,y满足不等式组
,则x+2y的最大值是________.
-
已知x、y满足不等式组
,则t=x-2y的最大值为________.
-
已知x、y满足不等式组
,则t=x-2y的最大值为________.
-
已知x,y满足不等式组
,则x+2y的最大值是( )
A.10
B.11
C.12
D.13