cho A = (x thuoc N / 2x=4) Viet A=2 co duoc khong ? Tai sao?
Viet mot so A bat ki co ba chu so, viet tiep ba chu so do mot lan nua, duoc so B co sau chu so. Chia so B cho 7, roi chia thuong tim duoc cho 11, sau do lai chia thuong tim duoc cho 13. Ket qua duoc so A. Giai thich tai sao ?
(khong dau dau nhe !)
Viet lien tiep tu 1 den 12 duoc so A=1234.....1112
Hoi A co the co 81 uoc duoc khong?vi sao?
trinh bay ra nua nhe
ai nhanh minh tick cho
Nguoi ta viet lien tiep cac so 1,2,3,...,1994 thanh mot hang ngang theo thu tu tuy y duoc duoc mot so A.Hoi A co the la so chinh phuong khong?
viet lien tiep tu 1 den 12 duoc so 123456789101112
hoi so tren co the co 81 uoc khong?vi sao?
Cho 9 diem trong do khong co 3 diem nao thang hang . Cu di qua 2 diem la duoc mot doan thang.
Hoi co the ve duoc bao nhieu doan thang ?
minh khong biet viet dau nen cac ban thong cam !
so 2009 co the viet duoc duoi dang tong cua 2 so nguyen to ko ? tai sao? giup minh voi
viet lien tiep cac so co hai chu so tu 19 den 80 thanh hang ngang ta duoc so 19202122...7980.so nay co chia het co 9 khong ? vi sao?
1)viet day tu nhien tu 1-101 tao thanh so A
a) A co phai hop so khong
b)A co phai so chinh phuong khong
c)A co the co 35 uoc khong
2)tim so chinh phuong co 4 chu so chu so hang nghin bang chu so hang don vi va so do co the viet duoi dang (5n+4)2
