a)Viet tap hop M cac so tu nhien lon hon 9, nho hon hoac bang 15 bang hai cach.
b)Viet tap hop A cac so tu nhien khong vuot qua 30 bang hai cach.
viet tap hop bang cach lien ket cac phan tu cua tap hop trong cac so tu nhien lon hon 14 nho hon15 co chua chu so 3 cac so 13 ,25,53 co thuoc tap hop hay khong
viet tap hop B cac so tu nhien nam giua 2 so a va a+6
viet cac phan tu cua tap hop B theo thu tu giam dan
Bai9: Cho A = { x ∈ N \ x ⋮ 2, x ⋮ 3,x< 100
B = { x ∈ N \ x ⋮ 6,x< 100
Hay viet cac tap hop A,B bang cach liet ke cac phan tu
1.viet tap hop M gom cac phan tu la uoc chung cua 12 va 24
2.Tim cac tap hop con cua M co 2 phan tu
3.Chi ra so nguyen to trong tap hop M
Cho hai tap hop A= {5;7},B={2;9}
Viet tap hop gom hai phan tu trong do co mot phan tu thuoc A, mot phan tu thuoc B
Viet tap hop cac chu so cua cac so:
a)97542 b)29635 c)60000
cho tap hop E ={1,a,b,2} cach viet nao la dung nhat
cho tap hop A={3;4;5}.Tap hop A co bao nhieu phan tu;co bao nhieu tap hop con