TIM N THUOC N DE 3N+2VA 4N+5 LA 2 SO NGUYEN TO CUNG NHAU
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 z de a la so nguyen
6n-3/3n+1
3n + 1.
tim n thuoc N sao cho 3n + 1 la so nguyen to
a, tim so nguyen to P+10; p+20 cung la so nguyen to
b, tim UCLN(3n+2;4-1);(a thuoc N)
tim x thuoc N de 11n la so nguyen to
tim n thuoc N de 2^n-1 va 2^n+1 la so nguyen to
tim n thuoc Z de
a)n+3/n-2 la so nguyen am
b)n+7/3n-1 la so tu nhien
c)3n+2/4n-5 la so tu nhien
d)15/n ; 12/n+2 va 6/2n-5 deu la so nguyen
ai giai duoc,trinh bay day du mik tick cho(mik can gap)
tim n thuoc Z de
n+7/3n-1 la so tu nhien(da hoc so nguyen roi nha)
Giải gấp, chiều mik nộp bài rồi
