Câu trả lời:
minh chi giai dc phan a thoi
Thay p=2 ta co p+2=4(loai)
Thay p=3 ta co p+2=5
p+4=7(t/m)
neu p la snt >3 thi p co dang :3k+1or 3k+3(noi chung la k hay n gi cung dc ko nhat thiet phai la k ko viet dong trong ngoac vao nha)
neu p=3k+1thi p+2=3k+1+2=3k+3 chia het cho 3 (loai)
neu p=3k+2 thi p+4=3k+2+4=3k+6 chia het cho 3(loai)
vay p=3 thi p+2;p+4 la snt.
ban oi xong roi the thoi ,to chiu hai phan con lai chang nghi dc gi