dinh nghia luy thua bac n cua a

neu cach viet mot tap hop . ap dung viet tap hop A cac so tu nhien x ma x thuoc so tu nhien khac khong va x nho hon hoac bang 7

khi nao so tu nhien a chia het cho so tu nhien b

viet lai cac tap hop va tinh so phan tu cua no

B={x thuoc n / ko chia het chi 2,x be hon hoac bang 30}

viet cac tap hop sau = cach chi ra tinh chat dac trung cho cac phan tu cua tap hop ?

a, tap hop X cac so tu nhien lon hon 0 va nho hon hoac bang 10 ?

b, tap hop Y cac so tu nhien co 2 chu so ?

c, tap hop M cac so tu nhien16 ; 25 ; 36 ; 49 ; 64 ; 81 ?

Cho tap hop A{x thuoc x <12} viet tap hop A bang cach liet ke cac phan tu

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.

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.

Cho tap hop A = X  E  N*/     3,x  < 15

a) Viet tap hop A bang cach liet ke cac phan tu tap hop

b)  Viet tap hop con co 1 phan tu cua tap hop A

Viet tap hop A cac so tu nhien lon hon 6 va nho hon hoac bang 10 bang hai cach