2n根号下(2x-y)的2n+1次方=-3.2n+1根号下(x-2y的2n+1次方=-3求X+2Y的值
问题描述:
2n根号下(2x-y)的2n+1次方=-3.2n+1根号下(x-2y的2n+1次方=-3求X+2Y的值
答
2n+1根号下(2x-y)的2n+1次方=-3.2n+1根号下(x-2y的2n+1次方=-3
2x-y=-3 (1)
x-2y=-3 (2)
(1)*2-(2) x=-1
把x=-1代入(1)得y=1
x+2y=1