Các câu hỏi tương tự
Cho A thuoc {0.1.2.3.4.5.6.7.8.9.10} biet A co hon 1 phan tu neu x,y,z thuoc A va x<y<z thi z =x.y tim A
tim x, y thuoc z biet :
/ x-y / + / y-z/ + /z - x / = 2015
tim x,y,z thuoc z biet /x/+/y/+/z/=0
tim x,y thuoc Z biet x*y=x+y
tim x,y thuoc Z biet xy=x-y
tim x ,y thuoc z biet: (x-1)(x+y) =32
tim x, y thuoc Z biet x+y -x.y = 7
tim x,y thuoc z biet: x - y = 6 - 2xy
tim x,y thuoc z biet: x - y = 6 - 2xy