Các câu hỏi tương tự
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 3 so nguyen to lon hon 3. CMR trong ba so ton tai 2 so co tong hoac hieu cua chung chia het cho 12
cho 4 so nguyen to lon hon 5.chung to rang luon ton tai it nhat hai so co tong hoac hieu chia het cho 18
chung to rang hieu ab -ba (voi a lon hon hoac bang b ) bao gio cung chia het cho 9
cho 15 so tu nhien khac nhau va khac 0,trong do moi so khong lon hon 28.chung to rang trong 15 so da cho bao gio cung tim duoc it nhat 1 nhom gom 3 so ma so nay bang tong cua 2 so con lai hoac 1 nhom gom 2 so ma so nay gap doi so con lai
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
Chung minh rang p+2 va p+4 la so nguyen to lon hon 3 thi tong cua chung chia het cho 12.
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.
1)chung to rang so nguyen to p;p>5 khi chia cho 6 chi 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
cac an giai giup minh minh dang can gap
ai giai nhanh minh tick cho