1 so chinh phuong co dang abcd.Biet ab - cd =1.tim abcd
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
tim so chinh phuong co 4 chu so sao cho 2 chu so dau tao thanh so chinh phuong va 2 chu so cuoi cung tao thanh so chinh phuong
so co dang 999999998000000001 la so chinh phuong khong ? Vi sao?
co bao nhieu so co dang ab thoa man ab+ba la mot so chinh phuong
co bao nhieu so co dang ab thoa man ab+ba la mot so chinh phuong
mot so chinh phuong co chu so hang chuc la mot so le . tim chu so tan cung cua so chinh phuong do