Các câu hỏi tương tự
CMR
neu p va p+2 la 2 so nguyen to lon hon 3 thi tong cua chung chia het cho 12
Chung minh rang trong 3 so nguyen to lon hon 3 luon co 2 so nguyen to ma tong hoac hieu cua chung chia het cho 12
cho p va p +2 la cac so nguyen to lon hon 3 .Chung minh rang p+1 chia het cho 6
chung to rang so nguyen to p;p>5 khi chia cho 6 co the du 1 hoac 5
2)chung minh rang neu p va p+2 la so nguyen to lon hon 3 thi p+1 la mot hop so
Cho p la so nguyen to lon hon 3. Biet rang p+2 cung la so nguyen to. Chung minh rang p+1 chia het cho 6.
Chung minh rang: Neu p la so nguyen to lon hon 3 thi (p-1) (p+1) chia het cho 24.
1.chung minh rang
A=2+2^2+2^3+...+2^30 chia het cho 7
2.chung minh rang neu p la so nguyen to lon hon 3 thi p^2-1chia het cho 24
giai nhanh ho minh nhe!
Chung to rang neu p la so nguyen to lon hon 3 thi p2 - 1 chia het cho 3
cho 3 so nguyen to lon hon 3 va so sau lon hon so truoc a don vi chung minh rang a chia het cho 6