A={14;15;16;17;18;19}
A={x\(\in\)N*,13 < x < 20}
A={14;15;16;17;18;19}
A={x\(\in\)N*,13 < x < 20}
e, E tap hop va so tu nhien le khong vuot qua 30
f, F tap hop cac so tu nhien chan khong vuot qua 30
g, G tap hop cac so tu nhien lon hon 30
h, H tap hop cac so tu nhien lon hon 30 nho hon 31
k, K tap hop cac so tu nhien chia cho 3 du 1 lon hon 20 nhung nho hon 100
Bai 1 : Viet tap hop A cac so tu nhien lon hon 4 va ko vuot qua 7 bang hai cach .
a ) Viet tap hop cac so tu nhien khac 0 va ko vuot qua 12 bang hai cach .
b ) Viet tap hop M cac so tu nhien lon hon hoac bang 11 va ko vuot qua 20 bang hai cach .
c ) Viet tap hop M cac so tu nhien lon hon 9 ,nho hon hoac bang 15 bang 2 cach .
d ) Viet tap hop A cac so tu nhien ko vuot qua 30 bang 2 cach .
e ) Viet tap hop B cac so tu nhien lon hon 5 bang 2 cach .
f ) Viet tap hop C cac so tu nhien lon hon hoac bang 18 va ko vuot qua 100 bang 2 cach .
Ai lam nhanh minh se tick cho nha ,minh can gap .
cho tap hop A la tap hop cac so tu nhien chan lon hon 20 va be hon 30 B la tap hop lon hon 2 va be hon 33 so phan tu thuoc tap hop C thuoc B ma khong thuoc A
cho tap hop A gom cac so tu nhien be hon 13 va lon hon 20
a)chi ra bang 2 cach
b) tap hop B gom cac so tu nhien x chan 13<x<20.tap hop B la gi cua tap hopA ,ki hieu nhu the nao?
so phan tu cua tap hop cac so tu nhien chan lon hon 13 va nho hon 3000 la;
so phan tu cua tap hop cac so tu nhien chan lon hon 13 va nho hon 3000 la
tap hop C gom cac so tu nhien chia het cho 3 va nho hon 20, lon hon 10 (viet bang 2 cach)
cho E là tap hop cac so tu nhien lon hon 13 nho hon hoac bang 21 theo 2 cách
cho 2 tập hợp A={1;2;3;4;5;6} va tap hop B la cac so tu nhien le lon hon 1 goi C la tap hop con cua A va B so phan tu nhieu nhat cua C la