Answer :

crisforp
4 = 16 / 4;
7 / 4 = 7 / 4;
-1 / 2 = - 2 / 4;
- 11 / 4 =- 11 / 4;
but, 16 / 4 - 9 / 4 = 7 / 4;
7 / 4 - 9 / 4 = - 2 / 4;
- 2 / 4 - 9 / 4 = - 11 / 4;
- 11 / 4 - 9 / 4 = - 20 / 4 = -5;
- 20 / 4 - 9 / 4 = - 29 / 4;
- 29 / 4 - 9 / 4 = - 38 / 4 = - 19 / 2;
Thhe next three terms are -5 ; - 29 / 4 and - 19 / 2.