Các câu hỏi tương tự
1) cho tap hop A={x=a2/a=2k,k thuoc N va 0<a<10} va tap hop B={y thuoc N/y=b^3, b thuoc N}
a)vi\et A va B duoi dang liet ke
b)viet tat ca cac tap hop con cua tap hop A
c)viet tap hop D={x thuoc N/x:64=1} chung to B=D
cac ban co gang giai nhanh giup minh !!thanks
cho cac so nguyen x;Y thuoc tap hop
{-35;-34;...;28}
tim:
a, GT lon nhat va nho nhat sua x-y
b, GT lon nhat va nho nhat cua XxY
so nguyen la gi .neu x la so nguyen thi x thuoc tap hop Z kohay tap hop z la tap hop cac so nguyen à
tim so phan tu trong cac tap hop sau
a)A={x thuoc N/x+8=14,5}
B={y thuoc N/y.3<72}
C={z thuoc N/1+2z>100}
D la tap hop cac so tu nhien le nho hon 10
cho x, y , z la cac so nguyen thoa man x . y - x. z + y.z - z^2 +1 =0 chung minh rang x+ y =0
viet cac tap hop sau va cho biet moi tap hop co bao nhieu phan tu :
a tap hop a cac so tu nhien x ma 17-x=3
b tap hop b cac so tu nhien x ma 15-y=16
c tap hop c cac so tu nhien x ma 13:z=1
d tap hop d cac so tu nhien t ,t e n* ma 0:t=0
moi nguoi giup minh nhe
1) Tim tat ca cac uoc chung cua hai so tu nhien lien tiep .
2) Tim tat ca cac uoc chung cua 5n + 6 va 8n + 7 (n thuoc N)
3)Mot khoi hoc sinh xep hang 4 , hang 5 ,hang 6 deu thua 1nguoi nhung xep hang 7 thi vua du .Biet so hs chua den 400 nguoi .Tinh so hs
4)Goi X la tap hop cac hoc sinh thich ca hat cua lop 6A .Tap hop Y la tap hop cac hoc sinh thic da bong cua lop 6A .Tap hop X giao Y bieu thi tap hop nao.
set xem tap hop a co la tap hop con cua b ko trong cac truong hop sau
a , A = { 1;3;5 } , B = { 1;3;7 }
b , A = { x , y } , { x , y ,z }
c , A la tap hop cac so tu nhien co tan cung bang 0,B la tap hop cac so tu nhien chan
tap hop tat ca cac so nguyen x thoa man ( 2- x ).(x+7) = 0