Sum of a series
Description (from Rosetta Code)
| Compute the nth term of a series, i.e. the sum of the n first terms of the corresponding sequence.
Informally this value, or its limit when n tends to infinity, is also called the sum of the series, thus the title of this task.
For this task, use:
This approximates the zeta function for S=2, whose exact value
is the solution of the Basel problem.
The series is provided as a lambda expression.
Forcing to give a decimal result:
The following approximates to the value of