Question

Answer 1

`a, 1/3 B = 2/(1.3) + 2/(3.5) + ... + 2/(2021.2023)`

`= 1/1 - 1/3 + 1/3 - 1/5 + .. .+ 1/2021 - 1/2023`

`= 2022/2023`

`-> B = 6066/2023`

`b, 2C = 2/(2.4) + ... + 2/(2020.2022)`

`= 1/2 - 1/4 + 1/4 - 1/6 + ... + 1/2020 - 1/2022`

`= 505/1011`

`-> C = 505/2022`