Các câu hỏi tương tự
neu p la so nguyen to lon hon 3 thi \(p^2\)-1 chia het cho 24
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 p+2 va p+4 la so nguyen to lon hon 3 thi tong cua chung chia het cho 12.
1.Tren nua mp bo chua tia Ox,ve cac tia Ox1,Ox2,Ox3,...,OxN sao cho:
xOx2=2xOx1,xOx3=3xOx1,.......,xOxN=NxOx1.tim so N nho nhat de trong cac tia da ve co mot tia la tia phan giac chung cua 2017 goc
2.CMR:neu p la so nguyen to lon hon 3 va 2p+1 cung la so nguyen to thi 4p+1 la hop so
3.So sanh: 63^15 va 34^18
4.tim cac so tu nhien n co hai chu so biet:2n+1 va 3n+1 deu la so chinh phuong
5.CMR: S=16^5+2^15 chia het cho 33
CMR neu p la so nguyen to lon hon thi p2-1 chia het cho 24
chung minh p la so nguyen to lon hon 3 thi (p-1) nhan (p+1) chia het cho 24
Chung minh rang: Neu p la so nguyen to lon hon 3 thi (p-1) (p+1) chia het cho 24.
Chung to rang neu p la so nguyen to lon hon 3 thi p2 - 1 chia het cho 3
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!