Đáp án:

 

Giải thích các bước giải:

`P = 34/(7.13) + 51/(13.22) + 85/(22.37) + 68/(37.49)`

`P = 17/3 * (6/(7.13) + 9/(13.22) + 15/(22.37) + 12/(37.49))`

`P = 17/3 * (1/7 - 1/13 + 1/13 - 1/22 + 1/22 - 1/37 + 1/37 - 1/49)`

`P = 17/3 * (1/7 - 1/49)`

`P = 17/3 * (7/49 - 1/49)`

`P = 17/3 * 6/49`

`P = 34/49`

`Q = 39/(7.16) + 65/(16.31) + 52/(31.43) + 26/(43.49)`

`Q = 13/3 * (9/(7.16) + 15/(16.31) + 12/(31.43) + 6/(43.49))`

`Q = 13/3 * (1/7 - 1/16 + 1/16 - 1/31 + 1/31 - 1/43 + 1/43 - 1/49)`

`Q = 13/3 * (1/7 - 1/49)`

`Q = 13/3 * 6/49`

`Q = 26/49`

`=>P/Q = (34/49) / (26/49)`

`=>P/Q = 17/13`