Các câu hỏi tương tự
CMR neu A=111...1(200 chu so 1) va B=222...2 (100 chu so 2) thi A-B la mot so chinh phuong
Cho a=111...12(n chu so 1);b=111...14(n chu so1)
Cmr:ab+1la 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
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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
neu a la so gam 200 chu so 1 va B la so gom 100 chu so 2 CMR A-B la so chinh phuong
Cho : A=111...1(2n chu so 1) - 888...8(n so 8)
Chung minh A la so chinh phuong.
Chieu mai nop roi . giup minh nha . Thanks.
so 144 co phai la so chinh phuong hay ko, cac so chinh phuong co chu so tan cung la gi.Cam on!
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
tap hop cac chu so tan cung co the co cua 1 so chinh phuong la