Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
neu co so tu nhien n sao cho k =n^2 thi ta noi so k la so chinh phuong tim tat ca cac so ab saocho (ab+ba) la so chinh phuong
tìm số nguyên tố sao cho ab - ba la 1 so chinh phuong
tim mot so chinh phuong gom4 chu so abcd = k mu 2 sao cho chuso cuoi la snt so k co tong cac chu so la 1 so chinh phuong
tim so nguyen to ab co 2 chu so khac nhau sao cho ba cung la 1 so nguyen to va ab - ba la 1 so chinh phuong
tim tat ca cac stn n sao cho ( 3n + 1 ) la 1 so chinh phuong
Tim so nguyen to (a>b>0) sao cho ab -ba la so chinh phuong
a, so co tong cac chu so la 2004 khong la so chinh phuong
b, so co tong cac chu so la 2006 khong la so chinh phuong
c, n = 20044+20043+20042+23 khong la so chinh phuong
tim so tu nhien lon hon 0 sao cho tong
1!+2!+...+n! la so chinh phuong
b)tim 1 so co 4 chu so sao cho so do vua la s chinh phuong vua la so lap phuong
tim hai so nguyen to ab co 2 chu so khac nhau sao cho ba cung la so nguyen to va ab - ba la 1 so chinh phuong
