chứng minh rằng
a,1\101+1\102+...+1\199+1\200 <1
b,1\101+1\102+...+1\149+1\150>1\3
c,1\101+1\102+...+1\199+1\200>7\12
chứng minh rằng :
1/101 + 1/102 + ... + 1/199 + 1/200 < 1
chứng minh rằng 1/101+1/102+...+1/199+1/200<1
Chứng minh rằng ; 1-1/2+1/3-1/4+...+1/199-1/200=1/101+1/102+000+1/200
Chứng minh rằng: 7/12< 1/101 + 1/102 +...+1/199 + 1/200 < 1
Chứng minh rằng :
1-1/2+1/3-1/4+.......+1/199-1/200 = 1/101+ 1/102+.......+1/200
Chứng minh rằng:
1 - 1/2 + 1/3 -1/4 + ... + 1/199 - 200= 1/101 + +1/102 + 1/103 + ... + 1/200
chứng minh rằng :1-1/2+1/3-1/4+...+1/199-1/200 = 1/101+1/102+1/103+1/104+...+1/200.
chứng minh rằng: 1-1/2+1/3-1/4+.......+1/199-1/200=1/101+1/102+1/103+.......+1/200