The series is .
Estimate the error using Remainder estimate for the integral test.
\Equation :
.
Where and
.
Subtract the three sides of the in equality by .
.
is the difference between the actual sum and the partial sum, which is called remainder
and the remainder is to be less than
.
Since we want but
.
Since . \ \
Since is an integer, so
has to be atleast
.
The sum of series is .
The sum of series is .