Tim cac so tu nhien A,B,C thoa man ca 2 dieu kien 20 nho hon A , nho hon B ,24 lon hon C lon hon B
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
so nao lon hon ,lon hon bao nhieu ?
A =2016.2016
B =2014.2014
a)viet tap hop C cac so chan lon hon 10 nhung nho hon 20 ;b) viet tap hop cac so chan lon hon 10 nhung nho hon 20
cho phan so a/b (a<b) cung them m don vị vào tu va mau thi phan so moi lon hon hay be hon a/b
cho phan so a/b (a<b) cung them m don vị vào tu va mau thi phan so moi lon hon hay be hon a/b
Tïm n thuoc N sao cho
a) 24 : het 2n - 1(n lon hon hoac bang 1)
b) 4n - 7 : het 2n - 1 (n lon hon hoac bang 1)
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 .
a+b+15=25.Hoi a,b bang may(biet a lon hon b)