Question

Va rog problema 3 si 4
dau coroana​

Answer 1

Răspuns:

3. |x|<=2--->-2<=x<=2--->x aparține {-2,-1,1,2} (x aparține Z*)

D={-2,-1,1,2}

C×D={(-3,-2),(-3,-1),(-3,1),(-3,2),(1,-2),(1,-1),(1,1),(1,2)}

D×C={(-2,-3),(-2,1),(-1,-3),(-1,1),(1,-3),(1,1),(2,-3),(2,1)}

4. A={-4,-2}

B={0,2,4,6}