Question

ajutați-ma va rog la 9
dau coroana

Answer 1

M1= {(x,y) ∈ Z×Z││x│=3, -3<y<1}

│x│=3=> x∈ {-3, 3}

-3<y<1=> y∈ {-2,-1, 0}

(x,y) ∈ {(-3,-2), (-3,-1), (-3,0), (3,-2), (3,-1), (3,0)}

M1={(-3,-2), (-3,-1), (-3,0), (3,-2), (3,-1), (3,0)}

M2= {(x,y) ∈ Z×Z││x│≤1, y²=4}

│x│≤1=> x∈ {-1, 0, 1}

y²=4=>y∈ {-2, 2}

(x,y) ∈ {(-1,-2), (-1,2), (0,-2), (0,2), (1,-2), (1,2)}

M2={(-1,-2), (-1,2), (0,-2), (0,2), (1,-2), (1,2)}

M3= {(x,y) ∈ Z×Z│(3x)²+y²=10}

9x²+y²=10=> x∈ {-1, 1}, y∈ {-1, 1}

(x,y) ∈ {(-1,-1), (-1,1), (1,-1), (1,1)}

M3={(-1,-1), (-1,1), (1,-1), (1,1)}