Question

fie multime A={-4,-0,-2,0,-1,0,1,2,3,4} aflatimultimile b=[x,y}eAXA|X=2Y|

Answer 1

Daca  A ={-4,-3,-2,0,-1, 1,2,3,4} Aflați mulțimile B={(x,y)€ A × A/x=2y}

x=2y⇒y=x/2

B= {(-4/2), (-3/2), (-2/2), (-1/2),(0/2), 1/2, 2/2, 3/2,4/2} (fiecare element al lui A se imarte cu 2 2 (y=x/2)

B={-2,  -3/2, -1, -1/2, 0, 1/2, 1, 3/2 , 2}