chung to n+1 va 4n+3 nguyen to cung nhau
1)n+1 va 3n+4 la nguyen to cung nhau
2)2n+3 va 4n+8 la 2 so nguyen to cung nhau
chung to rang 2n+3 va 4n+8 la 2 so nguyen to cung nhau
Bai tap 1: Cho n thuoc N. Chung minh 4n+9 va n+2 la hai so nguyen to cung nhau?
chung minh voi moi STN n cac so sau la 2 so nguyen to cung nhau
2n+3 va 4n+8
chung minh rang cac so sau day nguyen to cung nhau
A,3n+1 va 4n+1
B,2n+5 va 4n+9
Bai1 a,cho n thuoc N. Chung minh rang 6n+5 va 4n+3 la 2 so nguyen to cung nhau
b, tim so nguyen x sao cho x+2016 la so nguyen duong nho nhat
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 hai so n + 1 va 2n + 3 la hai so nguyen to cung nhau
