Các câu hỏi tương tự
tim n de :2^n-1 va 2^+1 deu la so nguyen to
bai 1
a, chung to rang 2n+5/n+3, ( n thuoc N ) la phan so toi gian
b, tim gia tri nguyen cua n de B= 2n+5/n+3 co gia tri la so nguyen
bai 2
tim so tu nhien nho nhat sao khi chia cho 3 du 1 cho 4 du 2 cho 5 du 3 cho 6 du 4 va chia het cho 11
Biet rang 3n cong 1 va 5n cong 4 (n thuoc N ) la 2 so khong nguyen to cung nhau . Tim UCLN cua 2 so tren
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 so p=10/n^2+4 la so nguyen to chan
tim m;n thuoc N sao cho m^2+2 la so nguyen to va 2m^2=n^2_2
tim n thuoc N de 3n + 60 la so nguyen to
tim n thuoc N de cac ap so sau nguyen to cung nhau
a) 3n + 2va 7n+1
b) 2n+7 va 5n+2
TIM N THUOC N DE 3N+2VA 4N+5 LA 2 SO NGUYEN TO CUNG NHAU