向量a,b,x,y满足a=y-x,b=2x-y,a的绝对值等于b的绝对值等于1,a乘以b等于0,求x绝对值加y的绝对值等于多少

根据 a = y-x; |a| = 1,可以得到 a a = (y-x)*(y-x) = yy + xx - 2 xy = 1; .(1)根据 b = 2x-y; |b| = 1,可以得到 b b = (2x-y)*(2x-y) = 4xx +yy -4xy = 1; .(2)根据 a乘以b等于0,可得 (y-x)*(2x-y) =2xy-yy-2xx+xy...