Toán Tính tổng: 3/8×11+3/11×14+3/14×17+…+1/605×608+1/608×611 10/10/2021 By Arianna Tính tổng: 3/8×11+3/11×14+3/14×17+…+1/605×608+1/608×611
Sửa đề: `3/(8×11)+3/(11×14)+…+3/(605×608)+3/(608×611)` `= 1/8 – 1/11 + 1/11 – 1/14 + … +1/605 – 1/608 + 1/608 – 1/611` `= 1/8 – 1/611` `= 611/4888 – 8/4888` `= 603/4888` (Chúc ban học tốt) Trả lời
Sửa đề: `3/(8×11)+3/(11×14)+…+3/(605×608)+3/(608×611)`
`= 1/8 – 1/11 + 1/11 – 1/14 + … +1/605 – 1/608 + 1/608 – 1/611`
`= 1/8 – 1/611`
`= 611/4888 – 8/4888`
`= 603/4888`
(Chúc ban học tốt)