chung minh rang tong sau khong phai la so tu nhien
1/2+1/3+1/4+1/5+1/6+...+1/16
chung minh rang A = 1/2 + 1/3 + 1/4 +...+ 1/50 khong phai la so tu nhien
CMR 1/2+1/3 +1/4 +...+1/16 khong phai la so tu nhien
chung minh C =49/1 +48/2 +...+2/48 +1/49 khong phai la so tu nhien
1+3+5+.......+(2n-1) , n thoc so tu nhien khac 0 . n co phai la so chinh phuong khong
Voi n la so tu nhien, cho: A=20134n(2013(4n+3)-1)-1. Chung minh rang A khong phai la so nguyen to.
cho a =1/2^2 +1/2^3 +1/2^4+.....+1/2^100 c/m A khong phai la so tu nhien
CAC BAN GIUP MINH GIAI NHE! AI GIAI DUNG MINH TICH CHO
Cho S = 1/3 + 1/5 + 1/7 + ... + 1/101
Chung to rang S khong phai la so tu nhien
Ai tra loi nhanh nhat va dung nhat thi minh se tick va ket ban nha!!!
Cho S=3/10+3/11+3/12+3/13+3/14. Chung minh 1<S<2. Tu do cho biet S co phai la so tu nhien khong