Chứng minh: 11/15<1/21+1/22+1/23+...+1/59+1/60<3/2 27/10/2021 Bởi Maria Chứng minh: 11/15<1/21+1/22+1/23+...+1/59+1/60<3/2
Đáp án:
`11/15<1/21+1/22+1/23+…+1/59+1/60<3/2`