voi n thuoc N chung to 2 so sau nguyen to cung nhau
6n + 5 va 2n + 3
chung minh rang so 2n+1 va 6n+5 nguyen to cung nhau voi moi so tu nhien n
cho A = 1+2+3+4+...+n va B = 2n + 1 ( voi n thuoc N , n lon hon hoac bang 2) chung minh A va B la hai so nguyen to cung nhau
cho a=1+2+3+...+n v b= 2n+1 (voi n thuoc N , n>hoac bang 2 ) . Chung minh rang a va b la 2 so nguyen to cung nhau
chung minh rang 2n+3 va 3n+5 la hai so nguyen to cung nhau (n thuoc N*)
Giúp mình bài này :
Chung minh rang 2 so 2n+3 va 3n+4 voi n thuoc N la 2 so nguyen to cung nhau
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
ai giup minh voi
chung to rang 2 so n+1 va 3n+1{n thuoc N} la 2 so nguyen to cung nhau
minh dang can gap...................''''
voi n so tu nhien thoa man 6n+1 va 7n-1 la hai so tu nhien khong nguyen to cung nhau thi uoc chung lon nhat cua 6n+1 va 7n-1 la bao nhieu