Cho S= 1/31 + 1/32 + 1/33 +....+ 1/59 + 1/60. CMR 3/5<S<4/5
Cho S=1/31+1/32+1/33+...+1/59+1/60 Chứng minh 3/5<S<4/5
Cho S=1/31+1/32+1/33+.........+1/59+1/60. C/m 3/5<S<4/5
Cho S=1/31+1/32+1/33+...+1/59+1/60 Chứng minh
3/5<S<4/5
Cho tổng S=1/31 +1/32 +1/33 +....+ 1/60 chứng tỏ s< 4/5
Cho S = 1/31+1/32+1/33+.......+1/60.Chứng minh 3/5 < S < 4/
cho S=1/31+1/32+1/33+...+1/60 Cmr S<4/5
Cho S = 1/31+1/32+1/33+..............+1/60. CMR: 3/5 < S < 4/5
Cho S=1/31+1/32+1/33+.........+1/60. CMR:3/5<S<4/5
