n la so nguyen to lon hon 3 nen ko chia het cho 3.
Vay n^2 chia cho 3 du 1 <=> n^2=3k+1
Do do : n^2+2006=3k+1+2006 =3k+2007 chia het cho 3
Vay n^2+2006 la hop so
**** nhe
a, tim n de n^2 + 2006 la mot so chinh phuong
b, Cho n la so nguyen to lon hon 3. Hoi n^2 + 2006 la so nguyen to hay hop so.
cho p la so nguyen to lon hon 3. Biet 8p+1 va p deu la so nguyen to (p lon hon 3).Hoi p+100 la so nguyen to hay hop so
cho n la so nguyen to lon hon 3. hoi n^2 la nguyen to hay hop so. ai lam loi giai va lam dung la duoc tich
cho dap an la hop so nhung phai lam cach lam
a)tim n de \(n^2+2006\) la mot so chinh phuong
b) cho n la so nguyen to lon hon 3 .hoi \(n^2+2006\) la so nguyen to hay hop so
cho P la so nguyen to lon hon e
a)chung to rang P co dang 6k+1hoac 6k+3
b)biet 8P+1va P deu la so nguyen to(Plon hon 3).Hoi P+100 ;a so nguyen to hay hop so
Cho n la so nguyen to >3
hoi n2 + 2006 la so nguyen to hay hop so
cho so nguyen to n>3.hoi n^2+2006 la so nguyen to hay hop so
tong cua 2 so nguyen to lon hon 2 la so nguyen to hay hop so ? Tai sao ?
Cho P la so nguyen to lon hon 3 va 5p+1 cung la so nguyen to. Chung minh rang 7p+1 la hop so
