The given sequence is
The term of the sequence is given by,
In the above expression, the sequence in the denominator is in an A.P.
The sum of the above sequence is given by,
Substitute the value of in equation (1).
The sum of equation (2) is given by,
Substitute the value of in the above expression from equation (2).
Further simplify the above expression.
Thus, the sum of the sequence is .