Tim n nguyen de p= 10/n^2+4 la so nguyen to chan
cho B=n/n-3(n thuoc Z , n khac 3)
tim tat ca cac gia tri nguyen cua n de B la so nguyen
CHo C= 3n+5.n+7(n thuoc Z, N khac -7)
tim tat ca cac gia tri nguyen cua n de C la so nguyen
tim n thuoc N de 2^n-1 va 2^n+1 la so nguyen to
tim n thuoc N sao cho
n.(n+6) la so nguyen to
n^2+10.n la so nguyen to
tim n thuoc N de 3n + 60 la so nguyen to
tim x thuoc N de 11n la so nguyen to
tim n thuoc z de a la so nguyen
6n-3/3n+1
TIM N THUOC N DE 3N+2VA 4N+5 LA 2 SO NGUYEN TO CUNG NHAU
a, tim so nguyen to P+10; p+20 cung la so nguyen to
b, tim UCLN(3n+2;4-1);(a thuoc N)
