Question

Design a class to overload a method series() as follows:

1. double series (double n) with one double argument and returns the sum of the series. 
   sum `1/1 + 1/2 + 1/3 + ................+ 1/n`
2. double series (double a, double n) with two double arguments and returns the sum of the series.
   sum `1/a^2 + 4/a^5 + 7/a^8 + 10/a^11 + .....................` to n terms

Answer 1

import java.util.*;
class FQ20 
{ 
double series(double n) 
{double sum = 0.0;
n = (int) n;
for (int i = 1; i <= n; i++)
sum += 1.00 / {double) i;
return sum;
}

double series(double a, double n)
{double sum = 0.0, x = 1;
int terms = (int) n;
for (int i = 1; i <= terms; i++)
{sum +=  x / Math.pow(a, x + 1);
x = x + 3;
}
return sum;
}}