voi p la so nguyen to lon hon 3 thi so du la ?
A=(p-1)(p+1) + 1 khi chia cho 24
voi p la so nguyen to lon hon 3 thi so du cua A= (p-1)(p+1) khi chia cho 24 la
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
bai 3 cho p la so nguyen to lon hon 3
A, chung to p co dang 6k+1 hoac 6k+5
B, cho p va 8p-1 la so nguyen to. chung to 8p+1 la hop so
bai 4
A, tim a va b biet rang a.b=320 va BCNN(a,b)=160
B, tim so tu nhien a nho nhat co 3 chu so sao cho khi chia a cho 11 du 5 va chia cho 13 thi du 8
Vì: p là số nguyên tố >3
nên p chia 3 dư 1 hoặc 2 và chia 2 dư 1
=> p khác; 6k;6k+2;6k+3;6k+4 (chia hết cho 3 hoặc 2)
=> p có dạng 6k+1 hoặc 6k+5 (đpcm)
đpcm=điều phải chứng minh
hơn nx mấy câu này dễ nhác :>
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.
cho p la so nguyen to lon hon 2.so du cua A=3^p -2^p khi chia cho 3 la
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
cho p la so nguyen to lon hon 2. so du cua A= 3^p - 2^p khi chia cho 3 la?
CMR neu p la so nguyen to lon hon thi p2-1 chia het cho 24