CMR: 1-1/2+1/3-1/4+.....-1/1990=1/996+1/997+.....+1/1990
1,CMR:1-1/2-1/3-1/4-...-1/1990=1/996 1/997 ... 1/1990
CMR: (1-1/2+1/3-1/4+1/5-...-1/1990)=(1/996+1/997+...+1/1990)
CMR:1- 1/2 + 1/3 - 1/4 + ... + 1/1989 - 1/1990 = 1/996 + 1/997 + ...1/1990
1,CMR:\(1-\frac{1}{2}-\frac{1}{3}-\frac{1}{4}-...-\frac{1}{1990}=\frac{1}{996}+\frac{1}{997}+\frac{1}{1990}\)
cmr 1-\(\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+.......-\frac{1}{1990}=\frac{1}{996}+\frac{1}{997}+\frac{1}{998}+.......+\frac{1}{1990}\)
chứng tỏ rằng 1 - 1/2 + 1/3 - 1/4 + .... - 1/1990 = 1/996 + 1/997 + 1/998 + ... + 1/1990
Chứng minh:
1-1/2+1/3+1/4+...+1/1990=1/996+1/997+1/1990
Chứng minh rằng : 1 - 1/2 + 1/3 - ... - 1/1990 = 1/996 + 1/997 +.....+ 1/1990
