tim 3 so nguyen to lien tiep p, q va r sao cho p2 + q2 + r2 cung la so nguyen to
Tim 3 so nguyen to lien tiep x, y, z ( voi x < y < z ) sao cho so A=\(x^2\)+\(y^2\)+\(z^2\)la mot so nguyen to.
tim 4 so nguyen to lien tiep sao cho tong 4 so do la so nguyen to
Chon cau sai
A.Hai so nguyen to chac chan la 2 so nguyen to cung nhau
B.Hai so tu nhien lien tiep la hai so nguyen to cung nhau
Tim 4 so nguyen to lien tiep sao cho tong cua 4 so nguyen to do cung la 1 so nguyen to
Tim bon so nguyen to lien tiep va tang dan p1<p2<p3<p4 sao cho q = p1+p22+p33+p4 cung la mot so nguyen to .
CMR:2 so tu nhien lien tiep la 2 so nguyen to cung nhau.(cho vi du nhe!)
tim 3 so nguyen to lien tiep sao cho tong cac binh phuong cua cac so so do la 1 so nguyen to
cho p,q,r la 3 so nguyen to >3.Chung minh rang p2 +q2+r2 la hop so
