cho A=1/101+1/102+1/103+...+1/199+1/200 cmr 5/8<a<3/4
CM B=1-1/2+1/3-1/4+.....+1/199-1/200 = 1/101+1/102+.....+1/199+1/200
Chứng minh :1-1/2+1/3-1/4+...+1/199-1/200=1/101+1/102+....+1/200
Chứng tỏ rằng: 1-1/2+1/3-1/4+...+1/99-1/200=1/101+1/102+...+1/199+1/200
chung minh rang 1-1/2+1/3-1/4+...+1/99-1/200=1/101+1/102+...+1/199+1/200
chứng tỏ rằng 1-1/2+1/3-1/4+.....+1/99-1/200=1/101+1/102+...+1/199+1/200
Chả ai giúp buồn quá di
Chứng minh rằng 1 - 1/2 + 1/3 - 1/4 + ... + 1/199 - 1/200 = 1/101 + 1/102 + ... + 1/200?
chứng tỏ rằng 1-\(\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{199}-\frac{1}{200}=\frac{1}{101}+\frac{1}{102}+...+\frac{1}{199}+\frac{1}{200}\)
Chứng minh:
1- 1/2 + 1/3- 1/4 ...+1/199- 1/200 = 1/101 + 1/102 +...+1/200
giúp mink nha các bạn
