A = {0 ; 2 ; 4 ; 6 ; 8}
A = {x thuộc N/ x = 2.k; x < 10}
B = {5 ; 7 ; 9}
B = {x thuộc N/x = 2.k + 1; 3 < x < 10}
\(A=\left\{0;2;3;4;8\right\}\)
\(B=\left\{5;7;9\right\}\)
C1 : \(A=\left\{0;2;4;6;8\right\}\)
C2 : \(A=\left\{x\in N\backslash x=2k;x< 10\right\}\)
C1 : \(B=\left\{5;7;9\right\}\)
C2 : \(B=\left\{x\in N\text{x}=2k+1;3< x< 10\right\}\)
A = {0 ; 2 ; 4 ; 6 ; 8}
A = {x thuộc N/ x = 2.k; x < 10}
B = {5 ; 7 ; 9}
B = {x thuộc N/x = 2.k + 1; 3 < x < 10}