已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y

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已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y已知有理数x,y满足1/2│x-2y│=-2│x-4│,

已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y
已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y

已知有理数x,y满足1/2│x-2y│=-2│x-4│,求4x∧2-3y
1/2│x-2y│= -2│x-4│化简为
|x-2y| = -4 |x-4|
|x-2y| = - |4x-16|
所以
|x-2y| = 0 ,-|4x-16| = 0
所以
x-2y = 0 ,x = 2y
4x-16 = 0 ,x = 4
所以
y = 2
所以 4x∧2-3y =16开3次根号= 2*2开3次根号