√(2x-y)²=3,³√(x-2y)³=-3,求x-y分之x+2y的值

√(2x-y)²=3,³√(x-2y)³=-3,求x-y分之x+2y的值
√(2x-y)²=3,³√(x-2y)³=-3,求x-y分之x+2y的值

√(2x-y)²=3,³√(x-2y)³=-3,求x-y分之x+2y的值
√(2x-y)²=3,
(1)2x-y>=0即y

√(2x-y)²=3,³√(x-2y)³=-3
说明：x-2y=-3
x=2y-3
x-y分之x+2y
=(2y-3+2y/(2y-3-y)
=(4y-3)/(y-3)