Các câu hỏi tương tự
chung minh rang so 2n+1 va 6n+5 nguyen to cung nhau voi moi so tu nhien n
chung minh rang voi moi so tu nhien n, cac so sau la hai so nguyen to cung nhau:
a) 7n + 10 va 5n + 7
b) 2n +3 va 4n +8
chung to rang voi moi so tu nhien n th (2n+1)va2n^2-1la hai so nguyen to cung nhau
Chung minh rang voi moi so n thi 2 so sau nguyen to cung nhau
2n+5 va 2n+7
2n+5 va 3n+8
5n+7 va 2n+3
chung to rang hai so n + 1 va 2n + 3 la hai so nguyen to cung nhau
chung to rang hai so 3n+4 va n+1 la hai so nguyen to cung nhau voi n la so tu nhien khac 0
Chung to rang voi moi so tu nhien n thi hai so 3n+5 va 5n+8 la hai so nguyen to cung nhau .
chung to rang voi moi so tu nhien N gia tri cua 2 bieu thuc 7n+10 va 5n+7 luon la 2 so nguyen to cung nhau
Chung to rang hai so 2n+7 va 2n+9 la hai so nguyen to cung nhau