Tu"song dong nai"co may phan tu
Tim phan so co gia tri bang phan so -35/14, dong thoi co tong cua tu so va mau so la 75
Tim phan so co gia tri bang gia tri phan so -35/14 dong thoi co tong cua tu so va mau so la75
M = ( 0 ; 2;4;......96;98;100;102;106)
Q = ( x E N* | x la so tu nhien , x <
a> Viet tap hop M bang cach chi ra tinh chat dac trung cua phan tu. Viet tap hop Q liet ke phan tu
b> Moi tap hop co may phan tu
co tat ca bao nhieu so tu nhien n trong khoang tu 1den 2008de cac phan so n+6/11va n+5/13 dong thoi nhan gia tri la so tu nhien
A=( 2;4;6;8) co may phan tu
U(100) co may phan tu
tap hop A cac thang co 27 ngay co may phan tu
GHIUP VOI NHA !!!!!!!!!!!!!!!
ban An co 30 000 dong dung de mua vo co 2 loai vo: loai 1 gia 3000 dong loai 2 gia 1500 dong ban An mua duoc nhieu nhat bao nhieu quyen vo neu
a) ban An chi mua vo loai1
b) ban An mua 5 quyen vo loai1 , so tien con lai mua vo loai 1
2)
a) cho tap hop A cac so tu nhien lon hon 7 va nho hon 13 . hay viet tap hop A bang hai cach
b) cho B ={2;4;6;8;.....;52;54} tap hop B co bao nhieu phan tu tinh tong cac phan tu thuoc tap hop B
