ajutor la 6 pls dau coroana (vreau si explicatie)

6.A={x=N l 4^(x+3)≤2¹⁰}
4^(x+3)≤2¹⁰
2^(2x+6)≤2¹⁰
2x+6≤10
2x≤4
B={y=N l y=2-x,x aparține A}
y=2-x
y1=2
y2=1
y3=0
=>A={0,1,2}
B={0,1,2}=>