Various other issues. The cout statement is inside one of the loops. It should appear after the end of the loop. Two loops are not required. Just one will suffice. You need to initialise the total (sum) to zero, then add each term of the series to it inside the loop.
The division i/j at line 8 is not needed at that point (but it could make a great deal of sense inside the loop). Because neither i nor j have been initialised on line 7, then on line 8 the result will be garbage at best, and at worst might involve division by zero which would cause a program exception (crash).
When you do the division, if both variables are type int, then integer division will be used. In this case you need floating point division.