4,6,.....,1996,1998 ;khoang cach la 2
(1998-4):2+1=998 so
4,6,.....,1996,1998 ;khoang cach la 2
(1998-4):2+1=998 so
Câu 1:so phan tu cua tap hop cac so tu nhien chan lon hon 3 va nho hon 2000
Câu 2:so phan tu cua tap hop cac so tu nhien chan khong vuot qua 30 la
Câu 3 co bao nhieu so tu nhien co hai chu so trong do chu so hang chuc nho hon chu so hang don vi la 5 ?
Câu 4:so phan tu cua tap hop cac so tu nhien khong vuot qua 20 la
Câu 5:cho tap hop M={5;8;9;1986;2010}co bao nhieu tap hop con cua M gpm nhung so chan?
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
so phan tu tap hop cac so tu nhien chan lon hon 3 nho hon 2000
so phan tu cua tap hop cac so tu nhien l lon hon 30 va nho hon 2000
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
so phan tu cua cac so tu nhien chan lon hon 3 va nho hon 2000?
cho A la tap hop cac so tu nhien chan nho hon 100, B la tap hop cac so tu nhien chia het cho 3 va nho hon 300.Tap hop A va tap hop B co tat ca so phan tu chung la
cho B la tap hop cac so tu nhien chan khong nho hon 13 va khong lon hon 3000. B co so phan tu la......