Các câu hỏi tương tự
chung to rang tong cua n so chan khac 0 khong phai la so chinh phuong
Cho day so : 1,3,6,10,15,..., n(n+1)/2,...
C/m tong 2 so hang lien tiep cua day bao gio cung la so chinh phuong.
Help me nhanh vs dung nhe! Thanks
cho a la 1 so chinh phuong co 4 chu so biet 2 chu so dau va 2 chu so cuoi cua giong nhau hoi a la bao nhieu
tim x,y de thoa man
a) n^2-4xy+7 la so chinh phuong
b) n^2-3n-1 la so chinh phuong
tim n la so tu nhien sao cho n2+2002 la 1 so chinh phuong
tim mot so chinh phuong co 4 chu so biet so gom 2 chu so dau lon hon so gom 2 chu so sau la 1 don vi
Cmr n^2+n+1 khòg la so chinh phuong vs n la so tu nhien lon hon 0
tim n thuoc N* sao cho n2+n+13 la so chinh phuong
tim tat ca cac so nguyen duong n sao cho so T=2^n+1 la so chinh phuong